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Finding the Fourth Proportional to 1,672.32, 2,506.84 and 698.70

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Solution

The fourth proportional to 1,672.32, 2,506.84 and 698.70 is: 1,047.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,672.32 : 2,506.84 = 698.70 : x
  2. Step 2: Convert to fraction form
    1,672.32/2,506.84 = 698.70/x
  3. Step 3: Cross multiply
    1,672.32x = 2,506.84 × 698.70
  4. Step 4: Simplify right side
    1,672.32x = 1,751,529.11
  5. Step 5: Solve for x
    x = 1,751,529.11/1,672.32
  6. Step 6: Final answer
    x = 1,047.36

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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.