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Finding the Fourth Proportional to 976.17, 1,463.30 and 391.01

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Solution

The fourth proportional to 976.17, 1,463.30 and 391.01 is: 586.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    976.17 : 1,463.30 = 391.01 : x
  2. Step 2: Convert to fraction form
    976.17/1,463.30 = 391.01/x
  3. Step 3: Cross multiply
    976.17x = 1,463.30 × 391.01
  4. Step 4: Simplify right side
    976.17x = 572,155.66
  5. Step 5: Solve for x
    x = 572,155.66/976.17
  6. Step 6: Final answer
    x = 586.12

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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.