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Finding the Fourth Proportional to 707.38, 1,060.80 and 274.30

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Solution

The fourth proportional to 707.38, 1,060.80 and 274.30 is: 411.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    707.38 : 1,060.80 = 274.30 : x
  2. Step 2: Convert to fraction form
    707.38/1,060.80 = 274.30/x
  3. Step 3: Cross multiply
    707.38x = 1,060.80 × 274.30
  4. Step 4: Simplify right side
    707.38x = 290,977.44
  5. Step 5: Solve for x
    x = 290,977.44/707.38
  6. Step 6: Final answer
    x = 411.35

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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.