Home / 1,038.18-1,431.17-742.94

Finding the Fourth Proportional to 1,038.18, 1,431.17 and 742.94

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Solution

The fourth proportional to 1,038.18, 1,431.17 and 742.94 is: 1,024.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,038.18 : 1,431.17 = 742.94 : x
  2. Step 2: Convert to fraction form
    1,038.18/1,431.17 = 742.94/x
  3. Step 3: Cross multiply
    1,038.18x = 1,431.17 × 742.94
  4. Step 4: Simplify right side
    1,038.18x = 1,063,270.72
  5. Step 5: Solve for x
    x = 1,063,270.72/1,038.18
  6. Step 6: Final answer
    x = 1,024.16

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.