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Finding the Fourth Proportional to 700.53, 966.78 and 405.83

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Solution

The fourth proportional to 700.53, 966.78 and 405.83 is: 560.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    700.53 : 966.78 = 405.83 : x
  2. Step 2: Convert to fraction form
    700.53/966.78 = 405.83/x
  3. Step 3: Cross multiply
    700.53x = 966.78 × 405.83
  4. Step 4: Simplify right side
    700.53x = 392,343.49
  5. Step 5: Solve for x
    x = 392,343.49/700.53
  6. Step 6: Final answer
    x = 560.07

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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.