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Finding the Fourth Proportional to 1,585.45, 2,187.98 and 886.82

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Solution

The fourth proportional to 1,585.45, 2,187.98 and 886.82 is: 1,223.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,585.45 : 2,187.98 = 886.82 : x
  2. Step 2: Convert to fraction form
    1,585.45/2,187.98 = 886.82/x
  3. Step 3: Cross multiply
    1,585.45x = 2,187.98 × 886.82
  4. Step 4: Simplify right side
    1,585.45x = 1,940,339.99
  5. Step 5: Solve for x
    x = 1,940,339.99/1,585.45
  6. Step 6: Final answer
    x = 1,223.85

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1.5x scale

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.