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Finding the Fourth Proportional to 4,387.60, 6,571.80 and 2,653.20

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Solution

The fourth proportional to 4,387.60, 6,571.80 and 2,653.20 is: 3,973.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,387.60 : 6,571.80 = 2,653.20 : x
  2. Step 2: Convert to fraction form
    4,387.60/6,571.80 = 2,653.20/x
  3. Step 3: Cross multiply
    4,387.60x = 6,571.80 × 2,653.20
  4. Step 4: Simplify right side
    4,387.60x = 17,436,299.76
  5. Step 5: Solve for x
    x = 17,436,299.76/4,387.60
  6. Step 6: Final answer
    x = 3,973.99

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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.