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Finding the Fourth Proportional to 889.85, 1,335.05 and 402.95

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Solution

The fourth proportional to 889.85, 1,335.05 and 402.95 is: 604.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    889.85 : 1,335.05 = 402.95 : x
  2. Step 2: Convert to fraction form
    889.85/1,335.05 = 402.95/x
  3. Step 3: Cross multiply
    889.85x = 1,335.05 × 402.95
  4. Step 4: Simplify right side
    889.85x = 537,956.38
  5. Step 5: Solve for x
    x = 537,956.38/889.85
  6. Step 6: Final answer
    x = 604.55

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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.