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Finding the Fourth Proportional to 2,860.40, 4,283.40 and 1,881.20

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Solution

The fourth proportional to 2,860.40, 4,283.40 and 1,881.20 is: 2,817.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,860.40 : 4,283.40 = 1,881.20 : x
  2. Step 2: Convert to fraction form
    2,860.40/4,283.40 = 1,881.20/x
  3. Step 3: Cross multiply
    2,860.40x = 4,283.40 × 1,881.20
  4. Step 4: Simplify right side
    2,860.40x = 8,057,932.08
  5. Step 5: Solve for x
    x = 8,057,932.08/2,860.40
  6. Step 6: Final answer
    x = 2,817.06

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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.