Home / 1,865.40-2,573.20-1,078.88

Finding the Fourth Proportional to 1,865.40, 2,573.20 and 1,078.88

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Solution

The fourth proportional to 1,865.40, 2,573.20 and 1,078.88 is: 1,488.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,865.40 : 2,573.20 = 1,078.88 : x
  2. Step 2: Convert to fraction form
    1,865.40/2,573.20 = 1,078.88/x
  3. Step 3: Cross multiply
    1,865.40x = 2,573.20 × 1,078.88
  4. Step 4: Simplify right side
    1,865.40x = 2,776,174.02
  5. Step 5: Solve for x
    x = 2,776,174.02/1,865.40
  6. Step 6: Final answer
    x = 1,488.25

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1.5x scale

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.