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Finding the Fourth Proportional to 485,205.60, 727,808.40 and 307,912.80

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Solution

The fourth proportional to 485,205.60, 727,808.40 and 307,912.80 is: 461,869.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,205.60 : 727,808.40 = 307,912.80 : x
  2. Step 2: Convert to fraction form
    485,205.60/727,808.40 = 307,912.80/x
  3. Step 3: Cross multiply
    485,205.60x = 727,808.40 × 307,912.80
  4. Step 4: Simplify right side
    485,205.60x = 224,101,522,307.52
  5. Step 5: Solve for x
    x = 224,101,522,307.52/485,205.60
  6. Step 6: Final answer
    x = 461,869.20

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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.