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Finding the Fourth Proportional to 700.70, 966.69 and 421.00

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Solution

The fourth proportional to 700.70, 966.69 and 421.00 is: 580.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    700.70 : 966.69 = 421.00 : x
  2. Step 2: Convert to fraction form
    700.70/966.69 = 421.00/x
  3. Step 3: Cross multiply
    700.70x = 966.69 × 421.00
  4. Step 4: Simplify right side
    700.70x = 406,974.07
  5. Step 5: Solve for x
    x = 406,974.07/700.70
  6. Step 6: Final answer
    x = 580.81

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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.