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Finding the Fourth Proportional to 663.62, 915.35 and 514.63

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Solution

The fourth proportional to 663.62, 915.35 and 514.63 is: 709.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    663.62 : 915.35 = 514.63 : x
  2. Step 2: Convert to fraction form
    663.62/915.35 = 514.63/x
  3. Step 3: Cross multiply
    663.62x = 915.35 × 514.63
  4. Step 4: Simplify right side
    663.62x = 471,065.46
  5. Step 5: Solve for x
    x = 471,065.46/663.62
  6. Step 6: Final answer
    x = 709.84

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.