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Finding the Fourth Proportional to 305.35, 457.99 and 88.90

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Solution

The fourth proportional to 305.35, 457.99 and 88.90 is: 133.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    305.35 : 457.99 = 88.90 : x
  2. Step 2: Convert to fraction form
    305.35/457.99 = 88.90/x
  3. Step 3: Cross multiply
    305.35x = 457.99 × 88.90
  4. Step 4: Simplify right side
    305.35x = 40,715.31
  5. Step 5: Solve for x
    x = 40,715.31/305.35
  6. Step 6: Final answer
    x = 133.34

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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.