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Finding the Fourth Proportional to 707.34, 1,060.14 and 321.78

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Solution

The fourth proportional to 707.34, 1,060.14 and 321.78 is: 482.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    707.34 : 1,060.14 = 321.78 : x
  2. Step 2: Convert to fraction form
    707.34/1,060.14 = 321.78/x
  3. Step 3: Cross multiply
    707.34x = 1,060.14 × 321.78
  4. Step 4: Simplify right side
    707.34x = 341,131.85
  5. Step 5: Solve for x
    x = 341,131.85/707.34
  6. Step 6: Final answer
    x = 482.27

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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.