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Finding the Fourth Proportional to 656.55, 982.80 and 474.30

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Solution

The fourth proportional to 656.55, 982.80 and 474.30 is: 709.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    656.55 : 982.80 = 474.30 : x
  2. Step 2: Convert to fraction form
    656.55/982.80 = 474.30/x
  3. Step 3: Cross multiply
    656.55x = 982.80 × 474.30
  4. Step 4: Simplify right side
    656.55x = 466,142.04
  5. Step 5: Solve for x
    x = 466,142.04/656.55
  6. Step 6: Final answer
    x = 709.99

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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.