Home / 638,578,140.80-957,867,211.20-485,523,132.80

Finding the Fourth Proportional to 638,578,140.80, 957,867,211.20 and 485,523,132.80

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Solution

The fourth proportional to 638,578,140.80, 957,867,211.20 and 485,523,132.80 is: 728,284,699.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,578,140.80 : 957,867,211.20 = 485,523,132.80 : x
  2. Step 2: Convert to fraction form
    638,578,140.80/957,867,211.20 = 485,523,132.80/x
  3. Step 3: Cross multiply
    638,578,140.80x = 957,867,211.20 × 485,523,132.80
  4. Step 4: Simplify right side
    638,578,140.80x = 465,066,689,188,223,296
  5. Step 5: Solve for x
    x = 465,066,689,188,223,296/638,578,140.80
  6. Step 6: Final answer
    x = 728,284,699.20

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Double scale
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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.