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Finding the Fourth Proportional to 2,602.78, 3,904.18 and 753.90

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Solution

The fourth proportional to 2,602.78, 3,904.18 and 753.90 is: 1,130.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,602.78 : 3,904.18 = 753.90 : x
  2. Step 2: Convert to fraction form
    2,602.78/3,904.18 = 753.90/x
  3. Step 3: Cross multiply
    2,602.78x = 3,904.18 × 753.90
  4. Step 4: Simplify right side
    2,602.78x = 2,943,355.05
  5. Step 5: Solve for x
    x = 2,943,355.05/2,602.78
  6. Step 6: Final answer
    x = 1,130.85

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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.