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Finding the Fourth Proportional to 515.31, 770.12 and 503.16

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Solution

The fourth proportional to 515.31, 770.12 and 503.16 is: 751.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    515.31 : 770.12 = 503.16 : x
  2. Step 2: Convert to fraction form
    515.31/770.12 = 503.16/x
  3. Step 3: Cross multiply
    515.31x = 770.12 × 503.16
  4. Step 4: Simplify right side
    515.31x = 387,491.06
  5. Step 5: Solve for x
    x = 387,491.06/515.31
  6. Step 6: Final answer
    x = 751.96

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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.