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Finding the Fourth Proportional to 470.85, 705.14 and 239.13

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Solution

The fourth proportional to 470.85, 705.14 and 239.13 is: 358.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    470.85 : 705.14 = 239.13 : x
  2. Step 2: Convert to fraction form
    470.85/705.14 = 239.13/x
  3. Step 3: Cross multiply
    470.85x = 705.14 × 239.13
  4. Step 4: Simplify right side
    470.85x = 168,618.93
  5. Step 5: Solve for x
    x = 168,618.93/470.85
  6. Step 6: Final answer
    x = 358.12

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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.