Home / 1,573.38-2,171.20-874.80

Finding the Fourth Proportional to 1,573.38, 2,171.20 and 874.80

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Solution

The fourth proportional to 1,573.38, 2,171.20 and 874.80 is: 1,207.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,573.38 : 2,171.20 = 874.80 : x
  2. Step 2: Convert to fraction form
    1,573.38/2,171.20 = 874.80/x
  3. Step 3: Cross multiply
    1,573.38x = 2,171.20 × 874.80
  4. Step 4: Simplify right side
    1,573.38x = 1,899,365.76
  5. Step 5: Solve for x
    x = 1,899,365.76/1,573.38
  6. Step 6: Final answer
    x = 1,207.19

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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.