Home / 1,359.90-2,039.58-386.02

Finding the Fourth Proportional to 1,359.90, 2,039.58 and 386.02

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Solution

The fourth proportional to 1,359.90, 2,039.58 and 386.02 is: 578.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,359.90 : 2,039.58 = 386.02 : x
  2. Step 2: Convert to fraction form
    1,359.90/2,039.58 = 386.02/x
  3. Step 3: Cross multiply
    1,359.90x = 2,039.58 × 386.02
  4. Step 4: Simplify right side
    1,359.90x = 787,318.67
  5. Step 5: Solve for x
    x = 787,318.67/1,359.90
  6. Step 6: Final answer
    x = 578.95

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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.