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Finding the Fourth Proportional to 1,038.38, 1,430.99 and 743.14

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Solution

The fourth proportional to 1,038.38, 1,430.99 and 743.14 is: 1,024.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,038.38 : 1,430.99 = 743.14 : x
  2. Step 2: Convert to fraction form
    1,038.38/1,430.99 = 743.14/x
  3. Step 3: Cross multiply
    1,038.38x = 1,430.99 × 743.14
  4. Step 4: Simplify right side
    1,038.38x = 1,063,425.91
  5. Step 5: Solve for x
    x = 1,063,425.91/1,038.38
  6. Step 6: Final answer
    x = 1,024.12

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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.