Home / 1,279.91-1,917.15-587.16

Finding the Fourth Proportional to 1,279.91, 1,917.15 and 587.16

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Solution

The fourth proportional to 1,279.91, 1,917.15 and 587.16 is: 879.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,279.91 : 1,917.15 = 587.16 : x
  2. Step 2: Convert to fraction form
    1,279.91/1,917.15 = 587.16/x
  3. Step 3: Cross multiply
    1,279.91x = 1,917.15 × 587.16
  4. Step 4: Simplify right side
    1,279.91x = 1,125,673.79
  5. Step 5: Solve for x
    x = 1,125,673.79/1,279.91
  6. Step 6: Final answer
    x = 879.50

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1.5x scale

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.