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Finding the Fourth Proportional to 706.72, 973.20 and 672.16

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Solution

The fourth proportional to 706.72, 973.20 and 672.16 is: 925.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    706.72 : 973.20 = 672.16 : x
  2. Step 2: Convert to fraction form
    706.72/973.20 = 672.16/x
  3. Step 3: Cross multiply
    706.72x = 973.20 × 672.16
  4. Step 4: Simplify right side
    706.72x = 654,146.11
  5. Step 5: Solve for x
    x = 654,146.11/706.72
  6. Step 6: Final answer
    x = 925.61

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.