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Finding the Fourth Proportional to 1,139.44, 1,707.32 and 590.80

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Solution

The fourth proportional to 1,139.44, 1,707.32 and 590.80 is: 885.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,139.44 : 1,707.32 = 590.80 : x
  2. Step 2: Convert to fraction form
    1,139.44/1,707.32 = 590.80/x
  3. Step 3: Cross multiply
    1,139.44x = 1,707.32 × 590.80
  4. Step 4: Simplify right side
    1,139.44x = 1,008,684.66
  5. Step 5: Solve for x
    x = 1,008,684.66/1,139.44
  6. Step 6: Final answer
    x = 885.25

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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.