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Finding the Fourth Proportional to 457.98, 631.87 and 300.57

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Solution

The fourth proportional to 457.98, 631.87 and 300.57 is: 414.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    457.98 : 631.87 = 300.57 : x
  2. Step 2: Convert to fraction form
    457.98/631.87 = 300.57/x
  3. Step 3: Cross multiply
    457.98x = 631.87 × 300.57
  4. Step 4: Simplify right side
    457.98x = 189,921.17
  5. Step 5: Solve for x
    x = 189,921.17/457.98
  6. Step 6: Final answer
    x = 414.69

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.