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Finding the Fourth Proportional to 709.02, 1,063.71 and 276.21

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Solution

The fourth proportional to 709.02, 1,063.71 and 276.21 is: 414.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    709.02 : 1,063.71 = 276.21 : x
  2. Step 2: Convert to fraction form
    709.02/1,063.71 = 276.21/x
  3. Step 3: Cross multiply
    709.02x = 1,063.71 × 276.21
  4. Step 4: Simplify right side
    709.02x = 293,807.34
  5. Step 5: Solve for x
    x = 293,807.34/709.02
  6. Step 6: Final answer
    x = 414.39

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.