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Finding the Fourth Proportional to 3,787.98, 5,681.94 and 1,322.80

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Solution

The fourth proportional to 3,787.98, 5,681.94 and 1,322.80 is: 1,984.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,787.98 : 5,681.94 = 1,322.80 : x
  2. Step 2: Convert to fraction form
    3,787.98/5,681.94 = 1,322.80/x
  3. Step 3: Cross multiply
    3,787.98x = 5,681.94 × 1,322.80
  4. Step 4: Simplify right side
    3,787.98x = 7,516,070.23
  5. Step 5: Solve for x
    x = 7,516,070.23/3,787.98
  6. Step 6: Final answer
    x = 1,984.19

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1.5x scale

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.