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Finding the Fourth Proportional to 1,681.52, 2,522.78 and 756.90

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Solution

The fourth proportional to 1,681.52, 2,522.78 and 756.90 is: 1,135.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,681.52 : 2,522.78 = 756.90 : x
  2. Step 2: Convert to fraction form
    1,681.52/2,522.78 = 756.90/x
  3. Step 3: Cross multiply
    1,681.52x = 2,522.78 × 756.90
  4. Step 4: Simplify right side
    1,681.52x = 1,909,494.07
  5. Step 5: Solve for x
    x = 1,909,494.07/1,681.52
  6. Step 6: Final answer
    x = 1,135.58

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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.