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Finding the Fourth Proportional to 493.16, 740.00 and 319.78

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Solution

The fourth proportional to 493.16, 740.00 and 319.78 is: 479.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    493.16 : 740.00 = 319.78 : x
  2. Step 2: Convert to fraction form
    493.16/740.00 = 319.78/x
  3. Step 3: Cross multiply
    493.16x = 740.00 × 319.78
  4. Step 4: Simplify right side
    493.16x = 236,633.75
  5. Step 5: Solve for x
    x = 236,633.75/493.16
  6. Step 6: Final answer
    x = 479.84

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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.