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Finding the Fourth Proportional to 510.67, 766.02 and 145.45

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Solution

The fourth proportional to 510.67, 766.02 and 145.45 is: 218.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    510.67 : 766.02 = 145.45 : x
  2. Step 2: Convert to fraction form
    510.67/766.02 = 145.45/x
  3. Step 3: Cross multiply
    510.67x = 766.02 × 145.45
  4. Step 4: Simplify right side
    510.67x = 111,417.61
  5. Step 5: Solve for x
    x = 111,417.61/510.67
  6. Step 6: Final answer
    x = 218.18

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.