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Finding the Fourth Proportional to 784.92, 1,083.20 and 435.61

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Solution

The fourth proportional to 784.92, 1,083.20 and 435.61 is: 601.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    784.92 : 1,083.20 = 435.61 : x
  2. Step 2: Convert to fraction form
    784.92/1,083.20 = 435.61/x
  3. Step 3: Cross multiply
    784.92x = 1,083.20 × 435.61
  4. Step 4: Simplify right side
    784.92x = 471,847.87
  5. Step 5: Solve for x
    x = 471,847.87/784.92
  6. Step 6: Final answer
    x = 601.14

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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.