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Finding the Fourth Proportional to 470.52, 648.36 and 387.36

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Solution

The fourth proportional to 470.52, 648.36 and 387.36 is: 533.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    470.52 : 648.36 = 387.36 : x
  2. Step 2: Convert to fraction form
    470.52/648.36 = 387.36/x
  3. Step 3: Cross multiply
    470.52x = 648.36 × 387.36
  4. Step 4: Simplify right side
    470.52x = 251,148.73
  5. Step 5: Solve for x
    x = 251,148.73/470.52
  6. Step 6: Final answer
    x = 533.77

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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.