Home / 1,205.10-1,806.45-554.70

Finding the Fourth Proportional to 1,205.10, 1,806.45 and 554.70

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Solution

The fourth proportional to 1,205.10, 1,806.45 and 554.70 is: 831.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,205.10 : 1,806.45 = 554.70 : x
  2. Step 2: Convert to fraction form
    1,205.10/1,806.45 = 554.70/x
  3. Step 3: Cross multiply
    1,205.10x = 1,806.45 × 554.70
  4. Step 4: Simplify right side
    1,205.10x = 1,002,037.82
  5. Step 5: Solve for x
    x = 1,002,037.82/1,205.10
  6. Step 6: Final answer
    x = 831.50

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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.