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Finding the Fourth Proportional to 1,267.77, 1,748.15 and 824.85

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Solution

The fourth proportional to 1,267.77, 1,748.15 and 824.85 is: 1,137.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,267.77 : 1,748.15 = 824.85 : x
  2. Step 2: Convert to fraction form
    1,267.77/1,748.15 = 824.85/x
  3. Step 3: Cross multiply
    1,267.77x = 1,748.15 × 824.85
  4. Step 4: Simplify right side
    1,267.77x = 1,441,957.40
  5. Step 5: Solve for x
    x = 1,441,957.40/1,267.77
  6. Step 6: Final answer
    x = 1,137.40

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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.