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Finding the Fourth Proportional to 709.80, 1,063.08 and 555.48

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Solution

The fourth proportional to 709.80, 1,063.08 and 555.48 is: 831.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    709.80 : 1,063.08 = 555.48 : x
  2. Step 2: Convert to fraction form
    709.80/1,063.08 = 555.48/x
  3. Step 3: Cross multiply
    709.80x = 1,063.08 × 555.48
  4. Step 4: Simplify right side
    709.80x = 590,519.68
  5. Step 5: Solve for x
    x = 590,519.68/709.80
  6. Step 6: Final answer
    x = 831.95

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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.