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Finding the Fourth Proportional to 513.92, 709.28 and 470.18

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Solution

The fourth proportional to 513.92, 709.28 and 470.18 is: 648.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    513.92 : 709.28 = 470.18 : x
  2. Step 2: Convert to fraction form
    513.92/709.28 = 470.18/x
  3. Step 3: Cross multiply
    513.92x = 709.28 × 470.18
  4. Step 4: Simplify right side
    513.92x = 333,483.37
  5. Step 5: Solve for x
    x = 333,483.37/513.92
  6. Step 6: Final answer
    x = 648.91

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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.