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Finding the Fourth Proportional to 976.87, 1,465.71 and 456.49

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Solution

The fourth proportional to 976.87, 1,465.71 and 456.49 is: 684.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    976.87 : 1,465.71 = 456.49 : x
  2. Step 2: Convert to fraction form
    976.87/1,465.71 = 456.49/x
  3. Step 3: Cross multiply
    976.87x = 1,465.71 × 456.49
  4. Step 4: Simplify right side
    976.87x = 669,081.96
  5. Step 5: Solve for x
    x = 669,081.96/976.87
  6. Step 6: Final answer
    x = 684.92

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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.