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Finding the Fourth Proportional to 457.58, 631.25 and 300.15

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Solution

The fourth proportional to 457.58, 631.25 and 300.15 is: 414.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    457.58 : 631.25 = 300.15 : x
  2. Step 2: Convert to fraction form
    457.58/631.25 = 300.15/x
  3. Step 3: Cross multiply
    457.58x = 631.25 × 300.15
  4. Step 4: Simplify right side
    457.58x = 189,468.19
  5. Step 5: Solve for x
    x = 189,468.19/457.58
  6. Step 6: Final answer
    x = 414.07

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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.