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Finding the Fourth Proportional to 371,580.43, 557,233.93 and 128,359.63

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Solution

The fourth proportional to 371,580.43, 557,233.93 and 128,359.63 is: 192,492.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    371,580.43 : 557,233.93 = 128,359.63 : x
  2. Step 2: Convert to fraction form
    371,580.43/557,233.93 = 128,359.63/x
  3. Step 3: Cross multiply
    371,580.43x = 557,233.93 × 128,359.63
  4. Step 4: Simplify right side
    371,580.43x = 71,526,337,650.28
  5. Step 5: Solve for x
    x = 71,526,337,650.28/371,580.43
  6. Step 6: Final answer
    x = 192,492.21

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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.