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Finding the Fourth Proportional to 637.59, 879.66 and 440.76

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Solution

The fourth proportional to 637.59, 879.66 and 440.76 is: 608.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    637.59 : 879.66 = 440.76 : x
  2. Step 2: Convert to fraction form
    637.59/879.66 = 440.76/x
  3. Step 3: Cross multiply
    637.59x = 879.66 × 440.76
  4. Step 4: Simplify right side
    637.59x = 387,718.94
  5. Step 5: Solve for x
    x = 387,718.94/637.59
  6. Step 6: Final answer
    x = 608.10

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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.