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Finding the Fourth Proportional to 470.00, 649.06 and 387.38

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Solution

The fourth proportional to 470.00, 649.06 and 387.38 is: 534.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    470.00 : 649.06 = 387.38 : x
  2. Step 2: Convert to fraction form
    470.00/649.06 = 387.38/x
  3. Step 3: Cross multiply
    470.00x = 649.06 × 387.38
  4. Step 4: Simplify right side
    470.00x = 251,428.65
  5. Step 5: Solve for x
    x = 251,428.65/470.00
  6. Step 6: Final answer
    x = 534.96

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.