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Finding the Fourth Proportional to 470.62, 706.02 and 145.91

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Solution

The fourth proportional to 470.62, 706.02 and 145.91 is: 218.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    470.62 : 706.02 = 145.91 : x
  2. Step 2: Convert to fraction form
    470.62/706.02 = 145.91/x
  3. Step 3: Cross multiply
    470.62x = 706.02 × 145.91
  4. Step 4: Simplify right side
    470.62x = 103,015.38
  5. Step 5: Solve for x
    x = 103,015.38/470.62
  6. Step 6: Final answer
    x = 218.89

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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.