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Finding the Fourth Proportional to 923.13, 1,381.44 and 576.63

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Solution

The fourth proportional to 923.13, 1,381.44 and 576.63 is: 862.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    923.13 : 1,381.44 = 576.63 : x
  2. Step 2: Convert to fraction form
    923.13/1,381.44 = 576.63/x
  3. Step 3: Cross multiply
    923.13x = 1,381.44 × 576.63
  4. Step 4: Simplify right side
    923.13x = 796,579.75
  5. Step 5: Solve for x
    x = 796,579.75/923.13
  6. Step 6: Final answer
    x = 862.91

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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.