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Finding the Fourth Proportional to 889.75, 1,335.11 and 433.75

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Solution

The fourth proportional to 889.75, 1,335.11 and 433.75 is: 650.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    889.75 : 1,335.11 = 433.75 : x
  2. Step 2: Convert to fraction form
    889.75/1,335.11 = 433.75/x
  3. Step 3: Cross multiply
    889.75x = 1,335.11 × 433.75
  4. Step 4: Simplify right side
    889.75x = 579,101.79
  5. Step 5: Solve for x
    x = 579,101.79/889.75
  6. Step 6: Final answer
    x = 650.86

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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.