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Finding the Fourth Proportional to 1,358.91, 1,874.21 and 886.77

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Solution

The fourth proportional to 1,358.91, 1,874.21 and 886.77 is: 1,223.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,358.91 : 1,874.21 = 886.77 : x
  2. Step 2: Convert to fraction form
    1,358.91/1,874.21 = 886.77/x
  3. Step 3: Cross multiply
    1,358.91x = 1,874.21 × 886.77
  4. Step 4: Simplify right side
    1,358.91x = 1,661,988.77
  5. Step 5: Solve for x
    x = 1,661,988.77/1,358.91
  6. Step 6: Final answer
    x = 1,223.03

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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.