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Finding the Fourth Proportional to 457.18, 684.86 and 425.18

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Solution

The fourth proportional to 457.18, 684.86 and 425.18 is: 636.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    457.18 : 684.86 = 425.18 : x
  2. Step 2: Convert to fraction form
    457.18/684.86 = 425.18/x
  3. Step 3: Cross multiply
    457.18x = 684.86 × 425.18
  4. Step 4: Simplify right side
    457.18x = 291,188.36
  5. Step 5: Solve for x
    x = 291,188.36/457.18
  6. Step 6: Final answer
    x = 636.93

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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.