Home / 1,267.18-1,900.80-342.70

Finding the Fourth Proportional to 1,267.18, 1,900.80 and 342.70

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Solution

The fourth proportional to 1,267.18, 1,900.80 and 342.70 is: 514.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,267.18 : 1,900.80 = 342.70 : x
  2. Step 2: Convert to fraction form
    1,267.18/1,900.80 = 342.70/x
  3. Step 3: Cross multiply
    1,267.18x = 1,900.80 × 342.70
  4. Step 4: Simplify right side
    1,267.18x = 651,399.41
  5. Step 5: Solve for x
    x = 651,399.41/1,267.18
  6. Step 6: Final answer
    x = 514.06

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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.