Home / 5,278.11-7,917.16-1,329.40

Finding the Fourth Proportional to 5,278.11, 7,917.16 and 1,329.40

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Solution

The fourth proportional to 5,278.11, 7,917.16 and 1,329.40 is: 1,994.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,278.11 : 7,917.16 = 1,329.40 : x
  2. Step 2: Convert to fraction form
    5,278.11/7,917.16 = 1,329.40/x
  3. Step 3: Cross multiply
    5,278.11x = 7,917.16 × 1,329.40
  4. Step 4: Simplify right side
    5,278.11x = 10,525,057.07
  5. Step 5: Solve for x
    x = 10,525,057.07/5,278.11
  6. Step 6: Final answer
    x = 1,994.10

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Similar ratio
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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.