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Finding the Fourth Proportional to 440.89, 661.64 and 437.47

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Solution

The fourth proportional to 440.89, 661.64 and 437.47 is: 656.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    440.89 : 661.64 = 437.47 : x
  2. Step 2: Convert to fraction form
    440.89/661.64 = 437.47/x
  3. Step 3: Cross multiply
    440.89x = 661.64 × 437.47
  4. Step 4: Simplify right side
    440.89x = 289,445.46
  5. Step 5: Solve for x
    x = 289,445.46/440.89
  6. Step 6: Final answer
    x = 656.51

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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.