Home / 1,645.11-2,269.89-981.86

Finding the Fourth Proportional to 1,645.11, 2,269.89 and 981.86

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Solution

The fourth proportional to 1,645.11, 2,269.89 and 981.86 is: 1,354.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,645.11 : 2,269.89 = 981.86 : x
  2. Step 2: Convert to fraction form
    1,645.11/2,269.89 = 981.86/x
  3. Step 3: Cross multiply
    1,645.11x = 2,269.89 × 981.86
  4. Step 4: Simplify right side
    1,645.11x = 2,228,702.85
  5. Step 5: Solve for x
    x = 2,228,702.85/1,645.11
  6. Step 6: Final answer
    x = 1,354.74

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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.