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Finding the Fourth Proportional to 1,135.06, 1,566.19 and 715.25

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Solution

The fourth proportional to 1,135.06, 1,566.19 and 715.25 is: 986.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,135.06 : 1,566.19 = 715.25 : x
  2. Step 2: Convert to fraction form
    1,135.06/1,566.19 = 715.25/x
  3. Step 3: Cross multiply
    1,135.06x = 1,566.19 × 715.25
  4. Step 4: Simplify right side
    1,135.06x = 1,120,217.40
  5. Step 5: Solve for x
    x = 1,120,217.40/1,135.06
  6. Step 6: Final answer
    x = 986.92

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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.