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Finding the Fourth Proportional to 259,808.70, 389,713.06 and 207,320.70

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Solution

The fourth proportional to 259,808.70, 389,713.06 and 207,320.70 is: 310,981.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,808.70 : 389,713.06 = 207,320.70 : x
  2. Step 2: Convert to fraction form
    259,808.70/389,713.06 = 207,320.70/x
  3. Step 3: Cross multiply
    259,808.70x = 389,713.06 × 207,320.70
  4. Step 4: Simplify right side
    259,808.70x = 80,795,584,398.34
  5. Step 5: Solve for x
    x = 80,795,584,398.34/259,808.70
  6. Step 6: Final answer
    x = 310,981.06

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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.