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Finding the Fourth Proportional to 1,645.96, 2,271.46 and 899.92

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Solution

The fourth proportional to 1,645.96, 2,271.46 and 899.92 is: 1,241.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,645.96 : 2,271.46 = 899.92 : x
  2. Step 2: Convert to fraction form
    1,645.96/2,271.46 = 899.92/x
  3. Step 3: Cross multiply
    1,645.96x = 2,271.46 × 899.92
  4. Step 4: Simplify right side
    1,645.96x = 2,044,132.28
  5. Step 5: Solve for x
    x = 2,044,132.28/1,645.96
  6. Step 6: Final answer
    x = 1,241.91

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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.