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Finding the Fourth Proportional to 285.95, 428.99 and 93.57

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Solution

The fourth proportional to 285.95, 428.99 and 93.57 is: 140.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    285.95 : 428.99 = 93.57 : x
  2. Step 2: Convert to fraction form
    285.95/428.99 = 93.57/x
  3. Step 3: Cross multiply
    285.95x = 428.99 × 93.57
  4. Step 4: Simplify right side
    285.95x = 40,140.13
  5. Step 5: Solve for x
    x = 40,140.13/285.95
  6. Step 6: Final answer
    x = 140.38

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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.