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Finding the Fourth Proportional to 700.89, 966.88 and 421.14

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Solution

The fourth proportional to 700.89, 966.88 and 421.14 is: 580.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    700.89 : 966.88 = 421.14 : x
  2. Step 2: Convert to fraction form
    700.89/966.88 = 421.14/x
  3. Step 3: Cross multiply
    700.89x = 966.88 × 421.14
  4. Step 4: Simplify right side
    700.89x = 407,191.84
  5. Step 5: Solve for x
    x = 407,191.84/700.89
  6. Step 6: Final answer
    x = 580.96

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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.