Home / 1,577.07-2,176.25-878.45

Finding the Fourth Proportional to 1,577.07, 2,176.25 and 878.45

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Solution

The fourth proportional to 1,577.07, 2,176.25 and 878.45 is: 1,212.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,577.07 : 2,176.25 = 878.45 : x
  2. Step 2: Convert to fraction form
    1,577.07/2,176.25 = 878.45/x
  3. Step 3: Cross multiply
    1,577.07x = 2,176.25 × 878.45
  4. Step 4: Simplify right side
    1,577.07x = 1,911,711.54
  5. Step 5: Solve for x
    x = 1,911,711.54/1,577.07
  6. Step 6: Final answer
    x = 1,212.19

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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.