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Finding the Fourth Proportional to 662,939.92, 993,744 and 213,330.32

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Solution

The fourth proportional to 662,939.92, 993,744 and 213,330.32 is: 319,781.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    662,939.92 : 993,744 = 213,330.32 : x
  2. Step 2: Convert to fraction form
    662,939.92/993,744 = 213,330.32/x
  3. Step 3: Cross multiply
    662,939.92x = 993,744 × 213,330.32
  4. Step 4: Simplify right side
    662,939.92x = 211,995,725,518.08
  5. Step 5: Solve for x
    x = 211,995,725,518.08/662,939.92
  6. Step 6: Final answer
    x = 319,781.20

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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.