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Finding the Fourth Proportional to 5,490, 7,578.12 and 3,282

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Solution

The fourth proportional to 5,490, 7,578.12 and 3,282 is: 4,530.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,490 : 7,578.12 = 3,282 : x
  2. Step 2: Convert to fraction form
    5,490/7,578.12 = 3,282/x
  3. Step 3: Cross multiply
    5,490x = 7,578.12 × 3,282
  4. Step 4: Simplify right side
    5,490x = 24,871,389.84
  5. Step 5: Solve for x
    x = 24,871,389.84/5,490
  6. Step 6: Final answer
    x = 4,530.31

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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.