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Finding the Fourth Proportional to 456.93, 681.72 and 399.07

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Solution

The fourth proportional to 456.93, 681.72 and 399.07 is: 595.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    456.93 : 681.72 = 399.07 : x
  2. Step 2: Convert to fraction form
    456.93/681.72 = 399.07/x
  3. Step 3: Cross multiply
    456.93x = 681.72 × 399.07
  4. Step 4: Simplify right side
    456.93x = 272,052.30
  5. Step 5: Solve for x
    x = 272,052.30/456.93
  6. Step 6: Final answer
    x = 595.39

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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.