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Finding the Fourth Proportional to 637.76, 880.38 and 404.88

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Solution

The fourth proportional to 637.76, 880.38 and 404.88 is: 558.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    637.76 : 880.38 = 404.88 : x
  2. Step 2: Convert to fraction form
    637.76/880.38 = 404.88/x
  3. Step 3: Cross multiply
    637.76x = 880.38 × 404.88
  4. Step 4: Simplify right side
    637.76x = 356,448.25
  5. Step 5: Solve for x
    x = 356,448.25/637.76
  6. Step 6: Final answer
    x = 558.91

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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.