Home / 1,577.19-2,176.56-878.61

Finding the Fourth Proportional to 1,577.19, 2,176.56 and 878.61

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Solution

The fourth proportional to 1,577.19, 2,176.56 and 878.61 is: 1,212.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,577.19 : 2,176.56 = 878.61 : x
  2. Step 2: Convert to fraction form
    1,577.19/2,176.56 = 878.61/x
  3. Step 3: Cross multiply
    1,577.19x = 2,176.56 × 878.61
  4. Step 4: Simplify right side
    1,577.19x = 1,912,347.38
  5. Step 5: Solve for x
    x = 1,912,347.38/1,577.19
  6. Step 6: Final answer
    x = 1,212.50

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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.