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Finding the Fourth Proportional to 2,289.17, 3,432.94 and 989.93

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Solution

The fourth proportional to 2,289.17, 3,432.94 and 989.93 is: 1,484.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,289.17 : 3,432.94 = 989.93 : x
  2. Step 2: Convert to fraction form
    2,289.17/3,432.94 = 989.93/x
  3. Step 3: Cross multiply
    2,289.17x = 3,432.94 × 989.93
  4. Step 4: Simplify right side
    2,289.17x = 3,398,348.18
  5. Step 5: Solve for x
    x = 3,398,348.18/2,289.17
  6. Step 6: Final answer
    x = 1,484.54

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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.