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Finding the Fourth Proportional to 638.75, 881.48 and 362.75

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Solution

The fourth proportional to 638.75, 881.48 and 362.75 is: 500.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    638.75 : 881.48 = 362.75 : x
  2. Step 2: Convert to fraction form
    638.75/881.48 = 362.75/x
  3. Step 3: Cross multiply
    638.75x = 881.48 × 362.75
  4. Step 4: Simplify right side
    638.75x = 319,755.06
  5. Step 5: Solve for x
    x = 319,755.06/638.75
  6. Step 6: Final answer
    x = 500.60

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Find fourth proportional to 319.38, 440.74 and 181.38
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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.