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Finding the Fourth Proportional to 464.64, 699.72 and 392.15

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Solution

The fourth proportional to 464.64, 699.72 and 392.15 is: 590.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    464.64 : 699.72 = 392.15 : x
  2. Step 2: Convert to fraction form
    464.64/699.72 = 392.15/x
  3. Step 3: Cross multiply
    464.64x = 699.72 × 392.15
  4. Step 4: Simplify right side
    464.64x = 274,391.70
  5. Step 5: Solve for x
    x = 274,391.70/464.64
  6. Step 6: Final answer
    x = 590.55

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.