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Finding the Fourth Proportional to 421,747.04, 632,620.98 and 172,429.04

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Solution

The fourth proportional to 421,747.04, 632,620.98 and 172,429.04 is: 258,643.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    421,747.04 : 632,620.98 = 172,429.04 : x
  2. Step 2: Convert to fraction form
    421,747.04/632,620.98 = 172,429.04/x
  3. Step 3: Cross multiply
    421,747.04x = 632,620.98 × 172,429.04
  4. Step 4: Simplify right side
    421,747.04x = 109,082,228,265.26
  5. Step 5: Solve for x
    x = 109,082,228,265.26/421,747.04
  6. Step 6: Final answer
    x = 258,643.73

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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.