Home / 3,590.40-5,385.78-1,281.90

Finding the Fourth Proportional to 3,590.40, 5,385.78 and 1,281.90

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Solution

The fourth proportional to 3,590.40, 5,385.78 and 1,281.90 is: 1,922.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,590.40 : 5,385.78 = 1,281.90 : x
  2. Step 2: Convert to fraction form
    3,590.40/5,385.78 = 1,281.90/x
  3. Step 3: Cross multiply
    3,590.40x = 5,385.78 × 1,281.90
  4. Step 4: Simplify right side
    3,590.40x = 6,904,031.38
  5. Step 5: Solve for x
    x = 6,904,031.38/3,590.40
  6. Step 6: Final answer
    x = 1,922.91

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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.