Home / 4,780.28-7,170.78-1,317.50

Finding the Fourth Proportional to 4,780.28, 7,170.78 and 1,317.50

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Solution

The fourth proportional to 4,780.28, 7,170.78 and 1,317.50 is: 1,976.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,780.28 : 7,170.78 = 1,317.50 : x
  2. Step 2: Convert to fraction form
    4,780.28/7,170.78 = 1,317.50/x
  3. Step 3: Cross multiply
    4,780.28x = 7,170.78 × 1,317.50
  4. Step 4: Simplify right side
    4,780.28x = 9,447,502.65
  5. Step 5: Solve for x
    x = 9,447,502.65/4,780.28
  6. Step 6: Final answer
    x = 1,976.35

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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.