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Finding the Fourth Proportional to 706.24, 1,053.39 and 665.58

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Solution

The fourth proportional to 706.24, 1,053.39 and 665.58 is: 992.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    706.24 : 1,053.39 = 665.58 : x
  2. Step 2: Convert to fraction form
    706.24/1,053.39 = 665.58/x
  3. Step 3: Cross multiply
    706.24x = 1,053.39 × 665.58
  4. Step 4: Simplify right side
    706.24x = 701,121.76
  5. Step 5: Solve for x
    x = 701,121.76/706.24
  6. Step 6: Final answer
    x = 992.75

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.