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Finding the Fourth Proportional to 706.60, 1,060.10 and 311.32

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Solution

The fourth proportional to 706.60, 1,060.10 and 311.32 is: 467.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    706.60 : 1,060.10 = 311.32 : x
  2. Step 2: Convert to fraction form
    706.60/1,060.10 = 311.32/x
  3. Step 3: Cross multiply
    706.60x = 1,060.10 × 311.32
  4. Step 4: Simplify right side
    706.60x = 330,030.33
  5. Step 5: Solve for x
    x = 330,030.33/706.60
  6. Step 6: Final answer
    x = 467.07

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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.