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Finding the Fourth Proportional to 1,267.17, 1,900.45 and 342.67

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Solution

The fourth proportional to 1,267.17, 1,900.45 and 342.67 is: 513.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,267.17 : 1,900.45 = 342.67 : x
  2. Step 2: Convert to fraction form
    1,267.17/1,900.45 = 342.67/x
  3. Step 3: Cross multiply
    1,267.17x = 1,900.45 × 342.67
  4. Step 4: Simplify right side
    1,267.17x = 651,223.29
  5. Step 5: Solve for x
    x = 651,223.29/1,267.17
  6. Step 6: Final answer
    x = 513.92

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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.