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Finding the Fourth Proportional to 1,175.26, 1,762.85 and 559.40

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Solution

The fourth proportional to 1,175.26, 1,762.85 and 559.40 is: 839.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,175.26 : 1,762.85 = 559.40 : x
  2. Step 2: Convert to fraction form
    1,175.26/1,762.85 = 559.40/x
  3. Step 3: Cross multiply
    1,175.26x = 1,762.85 × 559.40
  4. Step 4: Simplify right side
    1,175.26x = 986,139.90
  5. Step 5: Solve for x
    x = 986,139.90/1,175.26
  6. Step 6: Final answer
    x = 839.08

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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.