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Finding the Fourth Proportional to 510.80, 761.98 and 458.86

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Solution

The fourth proportional to 510.80, 761.98 and 458.86 is: 684.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    510.80 : 761.98 = 458.86 : x
  2. Step 2: Convert to fraction form
    510.80/761.98 = 458.86/x
  3. Step 3: Cross multiply
    510.80x = 761.98 × 458.86
  4. Step 4: Simplify right side
    510.80x = 349,642.14
  5. Step 5: Solve for x
    x = 349,642.14/510.80
  6. Step 6: Final answer
    x = 684.50

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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.