Home / 1,247.07-1,868.77-553.11

Finding the Fourth Proportional to 1,247.07, 1,868.77 and 553.11

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Solution

The fourth proportional to 1,247.07, 1,868.77 and 553.11 is: 828.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,247.07 : 1,868.77 = 553.11 : x
  2. Step 2: Convert to fraction form
    1,247.07/1,868.77 = 553.11/x
  3. Step 3: Cross multiply
    1,247.07x = 1,868.77 × 553.11
  4. Step 4: Simplify right side
    1,247.07x = 1,033,635.37
  5. Step 5: Solve for x
    x = 1,033,635.37/1,247.07
  6. Step 6: Final answer
    x = 828.85

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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.