Home / 5,315.85-7,975.48-1,618.79

Finding the Fourth Proportional to 5,315.85, 7,975.48 and 1,618.79

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Solution

The fourth proportional to 5,315.85, 7,975.48 and 1,618.79 is: 2,428.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,315.85 : 7,975.48 = 1,618.79 : x
  2. Step 2: Convert to fraction form
    5,315.85/7,975.48 = 1,618.79/x
  3. Step 3: Cross multiply
    5,315.85x = 7,975.48 × 1,618.79
  4. Step 4: Simplify right side
    5,315.85x = 12,910,619.18
  5. Step 5: Solve for x
    x = 12,910,619.18/5,315.85
  6. Step 6: Final answer
    x = 2,428.70

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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.