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Finding the Fourth Proportional to 656.68, 987.18 and 609.16

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Solution

The fourth proportional to 656.68, 987.18 and 609.16 is: 915.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    656.68 : 987.18 = 609.16 : x
  2. Step 2: Convert to fraction form
    656.68/987.18 = 609.16/x
  3. Step 3: Cross multiply
    656.68x = 987.18 × 609.16
  4. Step 4: Simplify right side
    656.68x = 601,350.57
  5. Step 5: Solve for x
    x = 601,350.57/656.68
  6. Step 6: Final answer
    x = 915.74

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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.