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Finding the Fourth Proportional to 438,068.88, 657,108.22 and 138,542.22

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Solution

The fourth proportional to 438,068.88, 657,108.22 and 138,542.22 is: 207,814.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,068.88 : 657,108.22 = 138,542.22 : x
  2. Step 2: Convert to fraction form
    438,068.88/657,108.22 = 138,542.22/x
  3. Step 3: Cross multiply
    438,068.88x = 657,108.22 × 138,542.22
  4. Step 4: Simplify right side
    438,068.88x = 91,037,231,579.05
  5. Step 5: Solve for x
    x = 91,037,231,579.05/438,068.88
  6. Step 6: Final answer
    x = 207,814.88

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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.