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Finding the Fourth Proportional to 758.35, 1,139.00 and 728.43

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Solution

The fourth proportional to 758.35, 1,139.00 and 728.43 is: 1,094.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    758.35 : 1,139.00 = 728.43 : x
  2. Step 2: Convert to fraction form
    758.35/1,139.00 = 728.43/x
  3. Step 3: Cross multiply
    758.35x = 1,139.00 × 728.43
  4. Step 4: Simplify right side
    758.35x = 829,678.13
  5. Step 5: Solve for x
    x = 829,678.13/758.35
  6. Step 6: Final answer
    x = 1,094.06

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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.