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Finding the Fourth Proportional to 707.58, 973.44 and 691.20

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Solution

The fourth proportional to 707.58, 973.44 and 691.20 is: 950.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    707.58 : 973.44 = 691.20 : x
  2. Step 2: Convert to fraction form
    707.58/973.44 = 691.20/x
  3. Step 3: Cross multiply
    707.58x = 973.44 × 691.20
  4. Step 4: Simplify right side
    707.58x = 672,841.73
  5. Step 5: Solve for x
    x = 672,841.73/707.58
  6. Step 6: Final answer
    x = 950.91

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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.