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Finding the Fourth Proportional to 440.56, 659.76 and 378.76

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Solution

The fourth proportional to 440.56, 659.76 and 378.76 is: 567.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    440.56 : 659.76 = 378.76 : x
  2. Step 2: Convert to fraction form
    440.56/659.76 = 378.76/x
  3. Step 3: Cross multiply
    440.56x = 659.76 × 378.76
  4. Step 4: Simplify right side
    440.56x = 249,890.70
  5. Step 5: Solve for x
    x = 249,890.70/440.56
  6. Step 6: Final answer
    x = 567.21

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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.