Home / 4,987.80-7,482.81-1,478.09

Finding the Fourth Proportional to 4,987.80, 7,482.81 and 1,478.09

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Solution

The fourth proportional to 4,987.80, 7,482.81 and 1,478.09 is: 2,217.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,987.80 : 7,482.81 = 1,478.09 : x
  2. Step 2: Convert to fraction form
    4,987.80/7,482.81 = 1,478.09/x
  3. Step 3: Cross multiply
    4,987.80x = 7,482.81 × 1,478.09
  4. Step 4: Simplify right side
    4,987.80x = 11,060,257.37
  5. Step 5: Solve for x
    x = 11,060,257.37/4,987.80
  6. Step 6: Final answer
    x = 2,217.46

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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.