Home / 4,720.40-7,080.58-1,257.65

Finding the Fourth Proportional to 4,720.40, 7,080.58 and 1,257.65

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Solution

The fourth proportional to 4,720.40, 7,080.58 and 1,257.65 is: 1,886.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,720.40 : 7,080.58 = 1,257.65 : x
  2. Step 2: Convert to fraction form
    4,720.40/7,080.58 = 1,257.65/x
  3. Step 3: Cross multiply
    4,720.40x = 7,080.58 × 1,257.65
  4. Step 4: Simplify right side
    4,720.40x = 8,904,891.44
  5. Step 5: Solve for x
    x = 8,904,891.44/4,720.40
  6. Step 6: Final answer
    x = 1,886.47

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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.