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Finding the Fourth Proportional to 4,870.88, 6,721.44 and 2,775.20

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Solution

The fourth proportional to 4,870.88, 6,721.44 and 2,775.20 is: 3,829.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,870.88 : 6,721.44 = 2,775.20 : x
  2. Step 2: Convert to fraction form
    4,870.88/6,721.44 = 2,775.20/x
  3. Step 3: Cross multiply
    4,870.88x = 6,721.44 × 2,775.20
  4. Step 4: Simplify right side
    4,870.88x = 18,653,340.29
  5. Step 5: Solve for x
    x = 18,653,340.29/4,870.88
  6. Step 6: Final answer
    x = 3,829.56

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.