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Finding the Fourth Proportional to 494,937.20, 742,405.80 and 317,790.20

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Solution

The fourth proportional to 494,937.20, 742,405.80 and 317,790.20 is: 476,685.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    494,937.20 : 742,405.80 = 317,790.20 : x
  2. Step 2: Convert to fraction form
    494,937.20/742,405.80 = 317,790.20/x
  3. Step 3: Cross multiply
    494,937.20x = 742,405.80 × 317,790.20
  4. Step 4: Simplify right side
    494,937.20x = 235,929,287,663.16
  5. Step 5: Solve for x
    x = 235,929,287,663.16/494,937.20
  6. Step 6: Final answer
    x = 476,685.30

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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.