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Finding the Fourth Proportional to 1,611.92, 2,417.88 and 746

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Solution

The fourth proportional to 1,611.92, 2,417.88 and 746 is: 1,119

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,611.92 : 2,417.88 = 746 : x
  2. Step 2: Convert to fraction form
    1,611.92/2,417.88 = 746/x
  3. Step 3: Cross multiply
    1,611.92x = 2,417.88 × 746
  4. Step 4: Simplify right side
    1,611.92x = 1,803,738.48
  5. Step 5: Solve for x
    x = 1,803,738.48/1,611.92
  6. Step 6: Final answer
    x = 1,119

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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.