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Finding the Fourth Proportional to 421,691, 632,623.98 and 172,373

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Solution

The fourth proportional to 421,691, 632,623.98 and 172,373 is: 258,595.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    421,691 : 632,623.98 = 172,373 : x
  2. Step 2: Convert to fraction form
    421,691/632,623.98 = 172,373/x
  3. Step 3: Cross multiply
    421,691x = 632,623.98 × 172,373
  4. Step 4: Simplify right side
    421,691x = 109,047,293,304.54
  5. Step 5: Solve for x
    x = 109,047,293,304.54/421,691
  6. Step 6: Final answer
    x = 258,595.26

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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.