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Finding the Fourth Proportional to 889.68, 1,331.20 and 573.10

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Solution

The fourth proportional to 889.68, 1,331.20 and 573.10 is: 857.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    889.68 : 1,331.20 = 573.10 : x
  2. Step 2: Convert to fraction form
    889.68/1,331.20 = 573.10/x
  3. Step 3: Cross multiply
    889.68x = 1,331.20 × 573.10
  4. Step 4: Simplify right side
    889.68x = 762,910.72
  5. Step 5: Solve for x
    x = 762,910.72/889.68
  6. Step 6: Final answer
    x = 857.51

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.