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Finding the Fourth Proportional to 700.28, 1,049.63 and 440.40

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Solution

The fourth proportional to 700.28, 1,049.63 and 440.40 is: 660.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    700.28 : 1,049.63 = 440.40 : x
  2. Step 2: Convert to fraction form
    700.28/1,049.63 = 440.40/x
  3. Step 3: Cross multiply
    700.28x = 1,049.63 × 440.40
  4. Step 4: Simplify right side
    700.28x = 462,258.79
  5. Step 5: Solve for x
    x = 462,258.79/700.28
  6. Step 6: Final answer
    x = 660.11

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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.