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Finding the Fourth Proportional to 438,354.56, 657,466.08 and 138,796.32

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Solution

The fourth proportional to 438,354.56, 657,466.08 and 138,796.32 is: 208,173.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,354.56 : 657,466.08 = 138,796.32 : x
  2. Step 2: Convert to fraction form
    438,354.56/657,466.08 = 138,796.32/x
  3. Step 3: Cross multiply
    438,354.56x = 657,466.08 × 138,796.32
  4. Step 4: Simplify right side
    438,354.56x = 91,253,872,428.83
  5. Step 5: Solve for x
    x = 91,253,872,428.83/438,354.56
  6. Step 6: Final answer
    x = 208,173.66

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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.