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Finding the Fourth Proportional to 424,657.20, 636,985.80 and 291,946.80

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Solution

The fourth proportional to 424,657.20, 636,985.80 and 291,946.80 is: 437,920.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    424,657.20 : 636,985.80 = 291,946.80 : x
  2. Step 2: Convert to fraction form
    424,657.20/636,985.80 = 291,946.80/x
  3. Step 3: Cross multiply
    424,657.20x = 636,985.80 × 291,946.80
  4. Step 4: Simplify right side
    424,657.20x = 185,965,965,955.44
  5. Step 5: Solve for x
    x = 185,965,965,955.44/424,657.20
  6. Step 6: Final answer
    x = 437,920.20

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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.