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Finding the Fourth Proportional to 410.65, 615.91 and 118.17

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Solution

The fourth proportional to 410.65, 615.91 and 118.17 is: 177.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    410.65 : 615.91 = 118.17 : x
  2. Step 2: Convert to fraction form
    410.65/615.91 = 118.17/x
  3. Step 3: Cross multiply
    410.65x = 615.91 × 118.17
  4. Step 4: Simplify right side
    410.65x = 72,782.08
  5. Step 5: Solve for x
    x = 72,782.08/410.65
  6. Step 6: Final answer
    x = 177.24

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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.