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Finding the Fourth Proportional to 438,068.25, 657,219.02 and 138,554.28

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Solution

The fourth proportional to 438,068.25, 657,219.02 and 138,554.28 is: 207,868.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,068.25 : 657,219.02 = 138,554.28 : x
  2. Step 2: Convert to fraction form
    438,068.25/657,219.02 = 138,554.28/x
  3. Step 3: Cross multiply
    438,068.25x = 657,219.02 × 138,554.28
  4. Step 4: Simplify right side
    438,068.25x = 91,060,507,425.63
  5. Step 5: Solve for x
    x = 91,060,507,425.63/438,068.25
  6. Step 6: Final answer
    x = 207,868.31

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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.