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Finding the Fourth Proportional to 511.24, 762.86 and 456.70

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Solution

The fourth proportional to 511.24, 762.86 and 456.70 is: 681.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    511.24 : 762.86 = 456.70 : x
  2. Step 2: Convert to fraction form
    511.24/762.86 = 456.70/x
  3. Step 3: Cross multiply
    511.24x = 762.86 × 456.70
  4. Step 4: Simplify right side
    511.24x = 348,398.16
  5. Step 5: Solve for x
    x = 348,398.16/511.24
  6. Step 6: Final answer
    x = 681.48

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.