Home / 1,295.12-1,789.80-1,151.12

Finding the Fourth Proportional to 1,295.12, 1,789.80 and 1,151.12

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Solution

The fourth proportional to 1,295.12, 1,789.80 and 1,151.12 is: 1,590.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,295.12 : 1,789.80 = 1,151.12 : x
  2. Step 2: Convert to fraction form
    1,295.12/1,789.80 = 1,151.12/x
  3. Step 3: Cross multiply
    1,295.12x = 1,789.80 × 1,151.12
  4. Step 4: Simplify right side
    1,295.12x = 2,060,274.58
  5. Step 5: Solve for x
    x = 2,060,274.58/1,295.12
  6. Step 6: Final answer
    x = 1,590.80

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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.