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Finding the Fourth Proportional to 3,069.84, 4,601.67 and 988.31

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Solution

The fourth proportional to 3,069.84, 4,601.67 and 988.31 is: 1,481.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,069.84 : 4,601.67 = 988.31 : x
  2. Step 2: Convert to fraction form
    3,069.84/4,601.67 = 988.31/x
  3. Step 3: Cross multiply
    3,069.84x = 4,601.67 × 988.31
  4. Step 4: Simplify right side
    3,069.84x = 4,547,876.48
  5. Step 5: Solve for x
    x = 4,547,876.48/3,069.84
  6. Step 6: Final answer
    x = 1,481.47

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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.