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Finding the Fourth Proportional to 532.78, 799.56 and 456.64

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Solution

The fourth proportional to 532.78, 799.56 and 456.64 is: 685.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    532.78 : 799.56 = 456.64 : x
  2. Step 2: Convert to fraction form
    532.78/799.56 = 456.64/x
  3. Step 3: Cross multiply
    532.78x = 799.56 × 456.64
  4. Step 4: Simplify right side
    532.78x = 365,111.08
  5. Step 5: Solve for x
    x = 365,111.08/532.78
  6. Step 6: Final answer
    x = 685.29

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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.