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Finding the Fourth Proportional to 1,038.46, 1,553.05 and 923.62

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Solution

The fourth proportional to 1,038.46, 1,553.05 and 923.62 is: 1,381.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,038.46 : 1,553.05 = 923.62 : x
  2. Step 2: Convert to fraction form
    1,038.46/1,553.05 = 923.62/x
  3. Step 3: Cross multiply
    1,038.46x = 1,553.05 × 923.62
  4. Step 4: Simplify right side
    1,038.46x = 1,434,428.04
  5. Step 5: Solve for x
    x = 1,434,428.04/1,038.46
  6. Step 6: Final answer
    x = 1,381.30

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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.