Home / 2,715.45-4,065.45-1,788.21

Finding the Fourth Proportional to 2,715.45, 4,065.45 and 1,788.21

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Solution

The fourth proportional to 2,715.45, 4,065.45 and 1,788.21 is: 2,677.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,715.45 : 4,065.45 = 1,788.21 : x
  2. Step 2: Convert to fraction form
    2,715.45/4,065.45 = 1,788.21/x
  3. Step 3: Cross multiply
    2,715.45x = 4,065.45 × 1,788.21
  4. Step 4: Simplify right side
    2,715.45x = 7,269,878.34
  5. Step 5: Solve for x
    x = 7,269,878.34/2,715.45
  6. Step 6: Final answer
    x = 2,677.23

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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.