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Finding the Fourth Proportional to 489,122.40, 733,683.60 and 431,385.60

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Solution

The fourth proportional to 489,122.40, 733,683.60 and 431,385.60 is: 647,078.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    489,122.40 : 733,683.60 = 431,385.60 : x
  2. Step 2: Convert to fraction form
    489,122.40/733,683.60 = 431,385.60/x
  3. Step 3: Cross multiply
    489,122.40x = 733,683.60 × 431,385.60
  4. Step 4: Simplify right side
    489,122.40x = 316,500,539,996.16
  5. Step 5: Solve for x
    x = 316,500,539,996.16/489,122.40
  6. Step 6: Final answer
    x = 647,078.40

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Similar ratio
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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.