Home / 1,409.13-2,113.63-369.11

Finding the Fourth Proportional to 1,409.13, 2,113.63 and 369.11

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Solution

The fourth proportional to 1,409.13, 2,113.63 and 369.11 is: 553.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,409.13 : 2,113.63 = 369.11 : x
  2. Step 2: Convert to fraction form
    1,409.13/2,113.63 = 369.11/x
  3. Step 3: Cross multiply
    1,409.13x = 2,113.63 × 369.11
  4. Step 4: Simplify right side
    1,409.13x = 780,165.53
  5. Step 5: Solve for x
    x = 780,165.53/1,409.13
  6. Step 6: Final answer
    x = 553.65

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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.