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Finding the Fourth Proportional to 491,812.80, 738,410.40 and 386,750.40

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Solution

The fourth proportional to 491,812.80, 738,410.40 and 386,750.40 is: 580,669.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    491,812.80 : 738,410.40 = 386,750.40 : x
  2. Step 2: Convert to fraction form
    491,812.80/738,410.40 = 386,750.40/x
  3. Step 3: Cross multiply
    491,812.80x = 738,410.40 × 386,750.40
  4. Step 4: Simplify right side
    491,812.80x = 285,580,517,564.16
  5. Step 5: Solve for x
    x = 285,580,517,564.16/491,812.80
  6. Step 6: Final answer
    x = 580,669.14

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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.