Home / 1,258.10-1,887.24-380.53

Finding the Fourth Proportional to 1,258.10, 1,887.24 and 380.53

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Solution

The fourth proportional to 1,258.10, 1,887.24 and 380.53 is: 570.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,258.10 : 1,887.24 = 380.53 : x
  2. Step 2: Convert to fraction form
    1,258.10/1,887.24 = 380.53/x
  3. Step 3: Cross multiply
    1,258.10x = 1,887.24 × 380.53
  4. Step 4: Simplify right side
    1,258.10x = 718,151.44
  5. Step 5: Solve for x
    x = 718,151.44/1,258.10
  6. Step 6: Final answer
    x = 570.82

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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.