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Finding the Fourth Proportional to 440.71, 657.18 and 436.76

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Solution

The fourth proportional to 440.71, 657.18 and 436.76 is: 651.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    440.71 : 657.18 = 436.76 : x
  2. Step 2: Convert to fraction form
    440.71/657.18 = 436.76/x
  3. Step 3: Cross multiply
    440.71x = 657.18 × 436.76
  4. Step 4: Simplify right side
    440.71x = 287,025.19
  5. Step 5: Solve for x
    x = 287,025.19/440.71
  6. Step 6: Final answer
    x = 651.28

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.