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Finding the Fourth Proportional to 1,267.16, 1,747.58 and 824.90

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Solution

The fourth proportional to 1,267.16, 1,747.58 and 824.90 is: 1,137.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,267.16 : 1,747.58 = 824.90 : x
  2. Step 2: Convert to fraction form
    1,267.16/1,747.58 = 824.90/x
  3. Step 3: Cross multiply
    1,267.16x = 1,747.58 × 824.90
  4. Step 4: Simplify right side
    1,267.16x = 1,441,578.74
  5. Step 5: Solve for x
    x = 1,441,578.74/1,267.16
  6. Step 6: Final answer
    x = 1,137.65

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.