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Finding the Fourth Proportional to 285.02, 427.50 and 99.93

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Solution

The fourth proportional to 285.02, 427.50 and 99.93 is: 149.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    285.02 : 427.50 = 99.93 : x
  2. Step 2: Convert to fraction form
    285.02/427.50 = 99.93/x
  3. Step 3: Cross multiply
    285.02x = 427.50 × 99.93
  4. Step 4: Simplify right side
    285.02x = 42,720.08
  5. Step 5: Solve for x
    x = 42,720.08/285.02
  6. Step 6: Final answer
    x = 149.88

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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.