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Finding the Fourth Proportional to 1,038.03, 1,558.16 and 923.21

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Solution

The fourth proportional to 1,038.03, 1,558.16 and 923.21 is: 1,385.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,038.03 : 1,558.16 = 923.21 : x
  2. Step 2: Convert to fraction form
    1,038.03/1,558.16 = 923.21/x
  3. Step 3: Cross multiply
    1,038.03x = 1,558.16 × 923.21
  4. Step 4: Simplify right side
    1,038.03x = 1,438,508.89
  5. Step 5: Solve for x
    x = 1,438,508.89/1,038.03
  6. Step 6: Final answer
    x = 1,385.81

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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.