Home / 765,332.80-1,147,999.20-485,166.40

Finding the Fourth Proportional to 765,332.80, 1,147,999.20 and 485,166.40

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Solution

The fourth proportional to 765,332.80, 1,147,999.20 and 485,166.40 is: 727,749.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    765,332.80 : 1,147,999.20 = 485,166.40 : x
  2. Step 2: Convert to fraction form
    765,332.80/1,147,999.20 = 485,166.40/x
  3. Step 3: Cross multiply
    765,332.80x = 1,147,999.20 × 485,166.40
  4. Step 4: Simplify right side
    765,332.80x = 556,970,639,066.88
  5. Step 5: Solve for x
    x = 556,970,639,066.88/765,332.80
  6. Step 6: Final answer
    x = 727,749.60

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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.