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Finding the Fourth Proportional to 2,239.90, 3,358.28 and 853.32

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Solution

The fourth proportional to 2,239.90, 3,358.28 and 853.32 is: 1,279.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,239.90 : 3,358.28 = 853.32 : x
  2. Step 2: Convert to fraction form
    2,239.90/3,358.28 = 853.32/x
  3. Step 3: Cross multiply
    2,239.90x = 3,358.28 × 853.32
  4. Step 4: Simplify right side
    2,239.90x = 2,865,687.49
  5. Step 5: Solve for x
    x = 2,865,687.49/2,239.90
  6. Step 6: Final answer
    x = 1,279.38

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1.5x scale

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.