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Finding the Fourth Proportional to 1,432.01, 2,147.55 and 457.88

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Solution

The fourth proportional to 1,432.01, 2,147.55 and 457.88 is: 686.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,432.01 : 2,147.55 = 457.88 : x
  2. Step 2: Convert to fraction form
    1,432.01/2,147.55 = 457.88/x
  3. Step 3: Cross multiply
    1,432.01x = 2,147.55 × 457.88
  4. Step 4: Simplify right side
    1,432.01x = 983,309.46
  5. Step 5: Solve for x
    x = 983,309.46/1,432.01
  6. Step 6: Final answer
    x = 686.67

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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.