Home / 1,385.22-2,077.40-1,077.42

Finding the Fourth Proportional to 1,385.22, 2,077.40 and 1,077.42

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Solution

The fourth proportional to 1,385.22, 2,077.40 and 1,077.42 is: 1,615.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,385.22 : 2,077.40 = 1,077.42 : x
  2. Step 2: Convert to fraction form
    1,385.22/2,077.40 = 1,077.42/x
  3. Step 3: Cross multiply
    1,385.22x = 2,077.40 × 1,077.42
  4. Step 4: Simplify right side
    1,385.22x = 2,238,232.31
  5. Step 5: Solve for x
    x = 2,238,232.31/1,385.22
  6. Step 6: Final answer
    x = 1,615.80

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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.