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Finding the Fourth Proportional to 421,009.32, 631,816.52 and 168,144.88

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Solution

The fourth proportional to 421,009.32, 631,816.52 and 168,144.88 is: 252,338.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    421,009.32 : 631,816.52 = 168,144.88 : x
  2. Step 2: Convert to fraction form
    421,009.32/631,816.52 = 168,144.88/x
  3. Step 3: Cross multiply
    421,009.32x = 631,816.52 × 168,144.88
  4. Step 4: Simplify right side
    421,009.32x = 106,236,712,937.42
  5. Step 5: Solve for x
    x = 106,236,712,937.42/421,009.32
  6. Step 6: Final answer
    x = 252,338.15

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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.