Home / 3,618.76-5,428.16-1,310.20

Finding the Fourth Proportional to 3,618.76, 5,428.16 and 1,310.20

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Solution

The fourth proportional to 3,618.76, 5,428.16 and 1,310.20 is: 1,965.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,618.76 : 5,428.16 = 1,310.20 : x
  2. Step 2: Convert to fraction form
    3,618.76/5,428.16 = 1,310.20/x
  3. Step 3: Cross multiply
    3,618.76x = 5,428.16 × 1,310.20
  4. Step 4: Simplify right side
    3,618.76x = 7,111,975.23
  5. Step 5: Solve for x
    x = 7,111,975.23/3,618.76
  6. Step 6: Final answer
    x = 1,965.31

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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.