Home / 485,121.40-727,811.70-432,892.60

Finding the Fourth Proportional to 485,121.40, 727,811.70 and 432,892.60

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Solution

The fourth proportional to 485,121.40, 727,811.70 and 432,892.60 is: 649,454.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,121.40 : 727,811.70 = 432,892.60 : x
  2. Step 2: Convert to fraction form
    485,121.40/727,811.70 = 432,892.60/x
  3. Step 3: Cross multiply
    485,121.40x = 727,811.70 × 432,892.60
  4. Step 4: Simplify right side
    485,121.40x = 315,064,299,123.42
  5. Step 5: Solve for x
    x = 315,064,299,123.42/485,121.40
  6. Step 6: Final answer
    x = 649,454.55

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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.