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Finding the Fourth Proportional to 1,475.68, 2,213.96 and 653.84

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Solution

The fourth proportional to 1,475.68, 2,213.96 and 653.84 is: 980.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,475.68 : 2,213.96 = 653.84 : x
  2. Step 2: Convert to fraction form
    1,475.68/2,213.96 = 653.84/x
  3. Step 3: Cross multiply
    1,475.68x = 2,213.96 × 653.84
  4. Step 4: Simplify right side
    1,475.68x = 1,447,575.61
  5. Step 5: Solve for x
    x = 1,447,575.61/1,475.68
  6. Step 6: Final answer
    x = 980.95

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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.