Home / 4,720.28-7,080.34-1,257.72

Finding the Fourth Proportional to 4,720.28, 7,080.34 and 1,257.72

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Solution

The fourth proportional to 4,720.28, 7,080.34 and 1,257.72 is: 1,886.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,720.28 : 7,080.34 = 1,257.72 : x
  2. Step 2: Convert to fraction form
    4,720.28/7,080.34 = 1,257.72/x
  3. Step 3: Cross multiply
    4,720.28x = 7,080.34 × 1,257.72
  4. Step 4: Simplify right side
    4,720.28x = 8,905,085.22
  5. Step 5: Solve for x
    x = 8,905,085.22/4,720.28
  6. Step 6: Final answer
    x = 1,886.56

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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.