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Finding the Fourth Proportional to 348,906.40, 523,000.56 and 138,693.28

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Solution

The fourth proportional to 348,906.40, 523,000.56 and 138,693.28 is: 207,897.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    348,906.40 : 523,000.56 = 138,693.28 : x
  2. Step 2: Convert to fraction form
    348,906.40/523,000.56 = 138,693.28/x
  3. Step 3: Cross multiply
    348,906.40x = 523,000.56 × 138,693.28
  4. Step 4: Simplify right side
    348,906.40x = 72,536,663,108.24
  5. Step 5: Solve for x
    x = 72,536,663,108.24/348,906.40
  6. Step 6: Final answer
    x = 207,897.20

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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.