Home / 1,645.32-2,269.74-981.96

Finding the Fourth Proportional to 1,645.32, 2,269.74 and 981.96

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Solution

The fourth proportional to 1,645.32, 2,269.74 and 981.96 is: 1,354.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,645.32 : 2,269.74 = 981.96 : x
  2. Step 2: Convert to fraction form
    1,645.32/2,269.74 = 981.96/x
  3. Step 3: Cross multiply
    1,645.32x = 2,269.74 × 981.96
  4. Step 4: Simplify right side
    1,645.32x = 2,228,793.89
  5. Step 5: Solve for x
    x = 2,228,793.89/1,645.32
  6. Step 6: Final answer
    x = 1,354.63

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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.