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Finding the Fourth Proportional to 1,226.91, 1,840.38 and 707.70

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Solution

The fourth proportional to 1,226.91, 1,840.38 and 707.70 is: 1,061.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,226.91 : 1,840.38 = 707.70 : x
  2. Step 2: Convert to fraction form
    1,226.91/1,840.38 = 707.70/x
  3. Step 3: Cross multiply
    1,226.91x = 1,840.38 × 707.70
  4. Step 4: Simplify right side
    1,226.91x = 1,302,436.93
  5. Step 5: Solve for x
    x = 1,302,436.93/1,226.91
  6. Step 6: Final answer
    x = 1,061.56

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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.