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Finding the Fourth Proportional to 706.92, 1,055.19 and 656.16

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Solution

The fourth proportional to 706.92, 1,055.19 and 656.16 is: 979.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    706.92 : 1,055.19 = 656.16 : x
  2. Step 2: Convert to fraction form
    706.92/1,055.19 = 656.16/x
  3. Step 3: Cross multiply
    706.92x = 1,055.19 × 656.16
  4. Step 4: Simplify right side
    706.92x = 692,373.47
  5. Step 5: Solve for x
    x = 692,373.47/706.92
  6. Step 6: Final answer
    x = 979.42

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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.