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Finding the Fourth Proportional to 3,540.18, 5,310 and 907.68

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Solution

The fourth proportional to 3,540.18, 5,310 and 907.68 is: 1,361.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,540.18 : 5,310 = 907.68 : x
  2. Step 2: Convert to fraction form
    3,540.18/5,310 = 907.68/x
  3. Step 3: Cross multiply
    3,540.18x = 5,310 × 907.68
  4. Step 4: Simplify right side
    3,540.18x = 4,819,780.80
  5. Step 5: Solve for x
    x = 4,819,780.80/3,540.18
  6. Step 6: Final answer
    x = 1,361.45

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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.