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Finding the Fourth Proportional to 438,302.80, 658,145.40 and 251,678.80

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Solution

The fourth proportional to 438,302.80, 658,145.40 and 251,678.80 is: 377,915.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,302.80 : 658,145.40 = 251,678.80 : x
  2. Step 2: Convert to fraction form
    438,302.80/658,145.40 = 251,678.80/x
  3. Step 3: Cross multiply
    438,302.80x = 658,145.40 × 251,678.80
  4. Step 4: Simplify right side
    438,302.80x = 165,641,244,497.52
  5. Step 5: Solve for x
    x = 165,641,244,497.52/438,302.80
  6. Step 6: Final answer
    x = 377,915.10

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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.