Home / 1,123.20-1,695.60-1,058.40

Finding the Fourth Proportional to 1,123.20, 1,695.60 and 1,058.40

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Solution

The fourth proportional to 1,123.20, 1,695.60 and 1,058.40 is: 1,597.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,123.20 : 1,695.60 = 1,058.40 : x
  2. Step 2: Convert to fraction form
    1,123.20/1,695.60 = 1,058.40/x
  3. Step 3: Cross multiply
    1,123.20x = 1,695.60 × 1,058.40
  4. Step 4: Simplify right side
    1,123.20x = 1,794,623.04
  5. Step 5: Solve for x
    x = 1,794,623.04/1,123.20
  6. Step 6: Final answer
    x = 1,597.78

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.