Home / 638,578,636.80-957,867,955.20-485,523,628.80

Finding the Fourth Proportional to 638,578,636.80, 957,867,955.20 and 485,523,628.80

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Solution

The fourth proportional to 638,578,636.80, 957,867,955.20 and 485,523,628.80 is: 728,285,443.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,578,636.80 : 957,867,955.20 = 485,523,628.80 : x
  2. Step 2: Convert to fraction form
    638,578,636.80/957,867,955.20 = 485,523,628.80/x
  3. Step 3: Cross multiply
    638,578,636.80x = 957,867,955.20 × 485,523,628.80
  4. Step 4: Simplify right side
    638,578,636.80x = 465,067,525,519,939,840
  5. Step 5: Solve for x
    x = 465,067,525,519,939,840/638,578,636.80
  6. Step 6: Final answer
    x = 728,285,443.20

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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.