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Finding the Fourth Proportional to 1,224.91, 1,688.88 and 782.92

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Solution

The fourth proportional to 1,224.91, 1,688.88 and 782.92 is: 1,079.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,224.91 : 1,688.88 = 782.92 : x
  2. Step 2: Convert to fraction form
    1,224.91/1,688.88 = 782.92/x
  3. Step 3: Cross multiply
    1,224.91x = 1,688.88 × 782.92
  4. Step 4: Simplify right side
    1,224.91x = 1,322,257.93
  5. Step 5: Solve for x
    x = 1,322,257.93/1,224.91
  6. Step 6: Final answer
    x = 1,079.47

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