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Finding the Fourth Proportional to 1,135.65, 1,702.14 and 649.04

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Solution

The fourth proportional to 1,135.65, 1,702.14 and 649.04 is: 972.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,135.65 : 1,702.14 = 649.04 : x
  2. Step 2: Convert to fraction form
    1,135.65/1,702.14 = 649.04/x
  3. Step 3: Cross multiply
    1,135.65x = 1,702.14 × 649.04
  4. Step 4: Simplify right side
    1,135.65x = 1,104,748.43
  5. Step 5: Solve for x
    x = 1,104,748.43/1,135.65
  6. Step 6: Final answer
    x = 972.79

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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.