Home / 1,428,501.76-2,142,691.20-431,200

Finding the Fourth Proportional to 1,428,501.76, 2,142,691.20 and 431,200

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Solution

The fourth proportional to 1,428,501.76, 2,142,691.20 and 431,200 is: 646,781.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,428,501.76 : 2,142,691.20 = 431,200 : x
  2. Step 2: Convert to fraction form
    1,428,501.76/2,142,691.20 = 431,200/x
  3. Step 3: Cross multiply
    1,428,501.76x = 2,142,691.20 × 431,200
  4. Step 4: Simplify right side
    1,428,501.76x = 923,928,445,440.00
  5. Step 5: Solve for x
    x = 923,928,445,440.00/1,428,501.76
  6. Step 6: Final answer
    x = 646,781.45

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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.