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Finding the Fourth Proportional to 707.79, 1,067.10 and 698.58

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Solution

The fourth proportional to 707.79, 1,067.10 and 698.58 is: 1,053.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    707.79 : 1,067.10 = 698.58 : x
  2. Step 2: Convert to fraction form
    707.79/1,067.10 = 698.58/x
  3. Step 3: Cross multiply
    707.79x = 1,067.10 × 698.58
  4. Step 4: Simplify right side
    707.79x = 745,454.72
  5. Step 5: Solve for x
    x = 745,454.72/707.79
  6. Step 6: Final answer
    x = 1,053.21

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.