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Finding the Fourth Proportional to 453,312.60, 679,968.90 and 272,909.40

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Solution

The fourth proportional to 453,312.60, 679,968.90 and 272,909.40 is: 409,364.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    453,312.60 : 679,968.90 = 272,909.40 : x
  2. Step 2: Convert to fraction form
    453,312.60/679,968.90 = 272,909.40/x
  3. Step 3: Cross multiply
    453,312.60x = 679,968.90 × 272,909.40
  4. Step 4: Simplify right side
    453,312.60x = 185,569,904,517.66
  5. Step 5: Solve for x
    x = 185,569,904,517.66/453,312.60
  6. Step 6: Final answer
    x = 409,364.10

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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.