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Finding the Fourth Proportional to 1,226.76, 1,693.08 and 702.76

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Solution

The fourth proportional to 1,226.76, 1,693.08 and 702.76 is: 969.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,226.76 : 1,693.08 = 702.76 : x
  2. Step 2: Convert to fraction form
    1,226.76/1,693.08 = 702.76/x
  3. Step 3: Cross multiply
    1,226.76x = 1,693.08 × 702.76
  4. Step 4: Simplify right side
    1,226.76x = 1,189,828.90
  5. Step 5: Solve for x
    x = 1,189,828.90/1,226.76
  6. Step 6: Final answer
    x = 969.90

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1.5x scale

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.