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Finding the Fourth Proportional to 1,267.76, 1,750.85 and 970.09

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Solution

The fourth proportional to 1,267.76, 1,750.85 and 970.09 is: 1,339.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,267.76 : 1,750.85 = 970.09 : x
  2. Step 2: Convert to fraction form
    1,267.76/1,750.85 = 970.09/x
  3. Step 3: Cross multiply
    1,267.76x = 1,750.85 × 970.09
  4. Step 4: Simplify right side
    1,267.76x = 1,698,480.12
  5. Step 5: Solve for x
    x = 1,698,480.12/1,267.76
  6. Step 6: Final answer
    x = 1,339.75

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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.