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Finding the Fourth Proportional to 976.29, 1,465.02 and 391.17

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Solution

The fourth proportional to 976.29, 1,465.02 and 391.17 is: 586.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    976.29 : 1,465.02 = 391.17 : x
  2. Step 2: Convert to fraction form
    976.29/1,465.02 = 391.17/x
  3. Step 3: Cross multiply
    976.29x = 1,465.02 × 391.17
  4. Step 4: Simplify right side
    976.29x = 573,071.87
  5. Step 5: Solve for x
    x = 573,071.87/976.29
  6. Step 6: Final answer
    x = 586.99

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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.