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Finding the Fourth Proportional to 457.16, 631.14 and 315.59

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Solution

The fourth proportional to 457.16, 631.14 and 315.59 is: 435.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    457.16 : 631.14 = 315.59 : x
  2. Step 2: Convert to fraction form
    457.16/631.14 = 315.59/x
  3. Step 3: Cross multiply
    457.16x = 631.14 × 315.59
  4. Step 4: Simplify right side
    457.16x = 199,181.47
  5. Step 5: Solve for x
    x = 199,181.47/457.16
  6. Step 6: Final answer
    x = 435.69

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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.