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Finding the Fourth Proportional to 387,225.20, 580,837.80 and 102,915.20

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Solution

The fourth proportional to 387,225.20, 580,837.80 and 102,915.20 is: 154,372.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,225.20 : 580,837.80 = 102,915.20 : x
  2. Step 2: Convert to fraction form
    387,225.20/580,837.80 = 102,915.20/x
  3. Step 3: Cross multiply
    387,225.20x = 580,837.80 × 102,915.20
  4. Step 4: Simplify right side
    387,225.20x = 59,777,038,354.56
  5. Step 5: Solve for x
    x = 59,777,038,354.56/387,225.20
  6. Step 6: Final answer
    x = 154,372.80

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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.