Home / 4,309.80-6,465.71-1,387.99

Finding the Fourth Proportional to 4,309.80, 6,465.71 and 1,387.99

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Solution

The fourth proportional to 4,309.80, 6,465.71 and 1,387.99 is: 2,082.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,309.80 : 6,465.71 = 1,387.99 : x
  2. Step 2: Convert to fraction form
    4,309.80/6,465.71 = 1,387.99/x
  3. Step 3: Cross multiply
    4,309.80x = 6,465.71 × 1,387.99
  4. Step 4: Simplify right side
    4,309.80x = 8,974,340.82
  5. Step 5: Solve for x
    x = 8,974,340.82/4,309.80
  6. Step 6: Final answer
    x = 2,082.31

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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.