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Finding the Fourth Proportional to 1,038.16, 1,555.42 and 925.17

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Solution

The fourth proportional to 1,038.16, 1,555.42 and 925.17 is: 1,386.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,038.16 : 1,555.42 = 925.17 : x
  2. Step 2: Convert to fraction form
    1,038.16/1,555.42 = 925.17/x
  3. Step 3: Cross multiply
    1,038.16x = 1,555.42 × 925.17
  4. Step 4: Simplify right side
    1,038.16x = 1,439,027.92
  5. Step 5: Solve for x
    x = 1,439,027.92/1,038.16
  6. Step 6: Final answer
    x = 1,386.13

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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.