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Finding the Fourth Proportional to 1,608, 2,411.52 and 620.64

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Solution

The fourth proportional to 1,608, 2,411.52 and 620.64 is: 930.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,608 : 2,411.52 = 620.64 : x
  2. Step 2: Convert to fraction form
    1,608/2,411.52 = 620.64/x
  3. Step 3: Cross multiply
    1,608x = 2,411.52 × 620.64
  4. Step 4: Simplify right side
    1,608x = 1,496,685.77
  5. Step 5: Solve for x
    x = 1,496,685.77/1,608
  6. Step 6: Final answer
    x = 930.77

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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.