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Finding the Fourth Proportional to 707.98, 1,061.94 and 275.23

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Solution

The fourth proportional to 707.98, 1,061.94 and 275.23 is: 412.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    707.98 : 1,061.94 = 275.23 : x
  2. Step 2: Convert to fraction form
    707.98/1,061.94 = 275.23/x
  3. Step 3: Cross multiply
    707.98x = 1,061.94 × 275.23
  4. Step 4: Simplify right side
    707.98x = 292,277.75
  5. Step 5: Solve for x
    x = 292,277.75/707.98
  6. Step 6: Final answer
    x = 412.83

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.