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Finding the Fourth Proportional to 457.70, 681.93 and 453.15

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Solution

The fourth proportional to 457.70, 681.93 and 453.15 is: 675.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    457.70 : 681.93 = 453.15 : x
  2. Step 2: Convert to fraction form
    457.70/681.93 = 453.15/x
  3. Step 3: Cross multiply
    457.70x = 681.93 × 453.15
  4. Step 4: Simplify right side
    457.70x = 309,016.58
  5. Step 5: Solve for x
    x = 309,016.58/457.70
  6. Step 6: Final answer
    x = 675.16

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.