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Finding the Fourth Proportional to 700.42, 966.58 and 389.92

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Solution

The fourth proportional to 700.42, 966.58 and 389.92 is: 538.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    700.42 : 966.58 = 389.92 : x
  2. Step 2: Convert to fraction form
    700.42/966.58 = 389.92/x
  3. Step 3: Cross multiply
    700.42x = 966.58 × 389.92
  4. Step 4: Simplify right side
    700.42x = 376,888.87
  5. Step 5: Solve for x
    x = 376,888.87/700.42
  6. Step 6: Final answer
    x = 538.09

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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.