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Finding the Fourth Proportional to 421,752.20, 632,628.30 and 172,375.88

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Solution

The fourth proportional to 421,752.20, 632,628.30 and 172,375.88 is: 258,563.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    421,752.20 : 632,628.30 = 172,375.88 : x
  2. Step 2: Convert to fraction form
    421,752.20/632,628.30 = 172,375.88/x
  3. Step 3: Cross multiply
    421,752.20x = 632,628.30 × 172,375.88
  4. Step 4: Simplify right side
    421,752.20x = 109,049,859,925.40
  5. Step 5: Solve for x
    x = 109,049,859,925.40/421,752.20
  6. Step 6: Final answer
    x = 258,563.82

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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.