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Finding the Fourth Proportional to 493.20, 681.12 and 467.28

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Solution

The fourth proportional to 493.20, 681.12 and 467.28 is: 645.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    493.20 : 681.12 = 467.28 : x
  2. Step 2: Convert to fraction form
    493.20/681.12 = 467.28/x
  3. Step 3: Cross multiply
    493.20x = 681.12 × 467.28
  4. Step 4: Simplify right side
    493.20x = 318,273.75
  5. Step 5: Solve for x
    x = 318,273.75/493.20
  6. Step 6: Final answer
    x = 645.32

Related Problems

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.