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Finding the Fourth Proportional to 421,882.79, 632,724.46 and 155,498.63

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Solution

The fourth proportional to 421,882.79, 632,724.46 and 155,498.63 is: 233,211.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    421,882.79 : 632,724.46 = 155,498.63 : x
  2. Step 2: Convert to fraction form
    421,882.79/632,724.46 = 155,498.63/x
  3. Step 3: Cross multiply
    421,882.79x = 632,724.46 × 155,498.63
  4. Step 4: Simplify right side
    421,882.79x = 98,387,786,697.49
  5. Step 5: Solve for x
    x = 98,387,786,697.49/421,882.79
  6. Step 6: Final answer
    x = 233,211.19

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Similar ratio
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1.5x scale

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.