Home / 3,810.47-5,715.99-1,213.40

Finding the Fourth Proportional to 3,810.47, 5,715.99 and 1,213.40

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Solution

The fourth proportional to 3,810.47, 5,715.99 and 1,213.40 is: 1,820.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,810.47 : 5,715.99 = 1,213.40 : x
  2. Step 2: Convert to fraction form
    3,810.47/5,715.99 = 1,213.40/x
  3. Step 3: Cross multiply
    3,810.47x = 5,715.99 × 1,213.40
  4. Step 4: Simplify right side
    3,810.47x = 6,935,753.69
  5. Step 5: Solve for x
    x = 6,935,753.69/3,810.47
  6. Step 6: Final answer
    x = 1,820.19

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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.