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Finding the Fourth Proportional to 976.18, 1,463.19 and 455.40

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Solution

The fourth proportional to 976.18, 1,463.19 and 455.40 is: 682.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    976.18 : 1,463.19 = 455.40 : x
  2. Step 2: Convert to fraction form
    976.18/1,463.19 = 455.40/x
  3. Step 3: Cross multiply
    976.18x = 1,463.19 × 455.40
  4. Step 4: Simplify right side
    976.18x = 666,332.18
  5. Step 5: Solve for x
    x = 666,332.18/976.18
  6. Step 6: Final answer
    x = 682.59

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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.