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Finding the Fourth Proportional to 1,149.12, 1,585.85 and 651.69

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Solution

The fourth proportional to 1,149.12, 1,585.85 and 651.69 is: 899.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,149.12 : 1,585.85 = 651.69 : x
  2. Step 2: Convert to fraction form
    1,149.12/1,585.85 = 651.69/x
  3. Step 3: Cross multiply
    1,149.12x = 1,585.85 × 651.69
  4. Step 4: Simplify right side
    1,149.12x = 1,033,479.33
  5. Step 5: Solve for x
    x = 1,033,479.33/1,149.12
  6. Step 6: Final answer
    x = 899.37

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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.