Home / 1,385.12-2,077.26-653.96

Finding the Fourth Proportional to 1,385.12, 2,077.26 and 653.96

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Solution

The fourth proportional to 1,385.12, 2,077.26 and 653.96 is: 980.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,385.12 : 2,077.26 = 653.96 : x
  2. Step 2: Convert to fraction form
    1,385.12/2,077.26 = 653.96/x
  3. Step 3: Cross multiply
    1,385.12x = 2,077.26 × 653.96
  4. Step 4: Simplify right side
    1,385.12x = 1,358,444.95
  5. Step 5: Solve for x
    x = 1,358,444.95/1,385.12
  6. Step 6: Final answer
    x = 980.74

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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.