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Finding the Fourth Proportional to 857.03, 1,182.33 and 542.25

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Solution

The fourth proportional to 857.03, 1,182.33 and 542.25 is: 748.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    857.03 : 1,182.33 = 542.25 : x
  2. Step 2: Convert to fraction form
    857.03/1,182.33 = 542.25/x
  3. Step 3: Cross multiply
    857.03x = 1,182.33 × 542.25
  4. Step 4: Simplify right side
    857.03x = 641,118.44
  5. Step 5: Solve for x
    x = 641,118.44/857.03
  6. Step 6: Final answer
    x = 748.07

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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.