Home / 1,363.28-2,045.04-389.40

Finding the Fourth Proportional to 1,363.28, 2,045.04 and 389.40

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Solution

The fourth proportional to 1,363.28, 2,045.04 and 389.40 is: 584.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,363.28 : 2,045.04 = 389.40 : x
  2. Step 2: Convert to fraction form
    1,363.28/2,045.04 = 389.40/x
  3. Step 3: Cross multiply
    1,363.28x = 2,045.04 × 389.40
  4. Step 4: Simplify right side
    1,363.28x = 796,338.58
  5. Step 5: Solve for x
    x = 796,338.58/1,363.28
  6. Step 6: Final answer
    x = 584.13

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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.