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Finding the Fourth Proportional to 899.96, 1,240.50 and 672.47

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Solution

The fourth proportional to 899.96, 1,240.50 and 672.47 is: 926.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    899.96 : 1,240.50 = 672.47 : x
  2. Step 2: Convert to fraction form
    899.96/1,240.50 = 672.47/x
  3. Step 3: Cross multiply
    899.96x = 1,240.50 × 672.47
  4. Step 4: Simplify right side
    899.96x = 834,199.04
  5. Step 5: Solve for x
    x = 834,199.04/899.96
  6. Step 6: Final answer
    x = 926.93

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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.