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Finding the Fourth Proportional to 1,038.88, 1,423.49 and 1,029.28

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Solution

The fourth proportional to 1,038.88, 1,423.49 and 1,029.28 is: 1,410.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,038.88 : 1,423.49 = 1,029.28 : x
  2. Step 2: Convert to fraction form
    1,038.88/1,423.49 = 1,029.28/x
  3. Step 3: Cross multiply
    1,038.88x = 1,423.49 × 1,029.28
  4. Step 4: Simplify right side
    1,038.88x = 1,465,169.79
  5. Step 5: Solve for x
    x = 1,465,169.79/1,038.88
  6. Step 6: Final answer
    x = 1,410.34

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.