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Finding the Fourth Proportional to 389,940.86, 584,949.84 and 162,189.74

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Solution

The fourth proportional to 389,940.86, 584,949.84 and 162,189.74 is: 243,300.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,940.86 : 584,949.84 = 162,189.74 : x
  2. Step 2: Convert to fraction form
    389,940.86/584,949.84 = 162,189.74/x
  3. Step 3: Cross multiply
    389,940.86x = 584,949.84 × 162,189.74
  4. Step 4: Simplify right side
    389,940.86x = 94,872,862,462.64
  5. Step 5: Solve for x
    x = 94,872,862,462.64/389,940.86
  6. Step 6: Final answer
    x = 243,300.64

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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.