Home / 780,028.20-1,170,042.30-638,310.60

Finding the Fourth Proportional to 780,028.20, 1,170,042.30 and 638,310.60

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Solution

The fourth proportional to 780,028.20, 1,170,042.30 and 638,310.60 is: 957,465.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    780,028.20 : 1,170,042.30 = 638,310.60 : x
  2. Step 2: Convert to fraction form
    780,028.20/1,170,042.30 = 638,310.60/x
  3. Step 3: Cross multiply
    780,028.20x = 1,170,042.30 × 638,310.60
  4. Step 4: Simplify right side
    780,028.20x = 746,850,402,538.38
  5. Step 5: Solve for x
    x = 746,850,402,538.38/780,028.20
  6. Step 6: Final answer
    x = 957,465.90

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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.