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Finding the Fourth Proportional to 4,772.80, 7,144.80 and 4,254.40

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Solution

The fourth proportional to 4,772.80, 7,144.80 and 4,254.40 is: 6,368.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,772.80 : 7,144.80 = 4,254.40 : x
  2. Step 2: Convert to fraction form
    4,772.80/7,144.80 = 4,254.40/x
  3. Step 3: Cross multiply
    4,772.80x = 7,144.80 × 4,254.40
  4. Step 4: Simplify right side
    4,772.80x = 30,396,837.12
  5. Step 5: Solve for x
    x = 30,396,837.12/4,772.80
  6. Step 6: Final answer
    x = 6,368.76

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1.5x scale

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.