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Finding the Fourth Proportional to 515.45, 769.17 and 503.10

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Solution

The fourth proportional to 515.45, 769.17 and 503.10 is: 750.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    515.45 : 769.17 = 503.10 : x
  2. Step 2: Convert to fraction form
    515.45/769.17 = 503.10/x
  3. Step 3: Cross multiply
    515.45x = 769.17 × 503.10
  4. Step 4: Simplify right side
    515.45x = 386,969.43
  5. Step 5: Solve for x
    x = 386,969.43/515.45
  6. Step 6: Final answer
    x = 750.74

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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.