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Finding the Fourth Proportional to 479.61, 661.87 and 374.82

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Solution

The fourth proportional to 479.61, 661.87 and 374.82 is: 517.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    479.61 : 661.87 = 374.82 : x
  2. Step 2: Convert to fraction form
    479.61/661.87 = 374.82/x
  3. Step 3: Cross multiply
    479.61x = 661.87 × 374.82
  4. Step 4: Simplify right side
    479.61x = 248,084.71
  5. Step 5: Solve for x
    x = 248,084.71/479.61
  6. Step 6: Final answer
    x = 517.26

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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.