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Finding the Fourth Proportional to 442,915.90, 664,373.85 and 411,423.10

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Solution

The fourth proportional to 442,915.90, 664,373.85 and 411,423.10 is: 617,134.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    442,915.90 : 664,373.85 = 411,423.10 : x
  2. Step 2: Convert to fraction form
    442,915.90/664,373.85 = 411,423.10/x
  3. Step 3: Cross multiply
    442,915.90x = 664,373.85 × 411,423.10
  4. Step 4: Simplify right side
    442,915.90x = 273,338,748,925.94
  5. Step 5: Solve for x
    x = 273,338,748,925.94/442,915.90
  6. Step 6: Final answer
    x = 617,134.65

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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.