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Finding the Fourth Proportional to 1,573.12, 2,170.88 and 874.48

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Solution

The fourth proportional to 1,573.12, 2,170.88 and 874.48 is: 1,206.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,573.12 : 2,170.88 = 874.48 : x
  2. Step 2: Convert to fraction form
    1,573.12/2,170.88 = 874.48/x
  3. Step 3: Cross multiply
    1,573.12x = 2,170.88 × 874.48
  4. Step 4: Simplify right side
    1,573.12x = 1,898,391.14
  5. Step 5: Solve for x
    x = 1,898,391.14/1,573.12
  6. Step 6: Final answer
    x = 1,206.77

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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.