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Finding the Fourth Proportional to 700.28, 966.80 and 438.65

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Solution

The fourth proportional to 700.28, 966.80 and 438.65 is: 605.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    700.28 : 966.80 = 438.65 : x
  2. Step 2: Convert to fraction form
    700.28/966.80 = 438.65/x
  3. Step 3: Cross multiply
    700.28x = 966.80 × 438.65
  4. Step 4: Simplify right side
    700.28x = 424,086.82
  5. Step 5: Solve for x
    x = 424,086.82/700.28
  6. Step 6: Final answer
    x = 605.60

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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.