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Finding the Fourth Proportional to 700.20, 966.12 and 389.70

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Solution

The fourth proportional to 700.20, 966.12 and 389.70 is: 537.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    700.20 : 966.12 = 389.70 : x
  2. Step 2: Convert to fraction form
    700.20/966.12 = 389.70/x
  3. Step 3: Cross multiply
    700.20x = 966.12 × 389.70
  4. Step 4: Simplify right side
    700.20x = 376,496.96
  5. Step 5: Solve for x
    x = 376,496.96/700.20
  6. Step 6: Final answer
    x = 537.70

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1.5x scale

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.