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Finding the Fourth Proportional to 479,542.95, 661,362.98 and 288,520.65

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Solution

The fourth proportional to 479,542.95, 661,362.98 and 288,520.65 is: 397,914.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    479,542.95 : 661,362.98 = 288,520.65 : x
  2. Step 2: Convert to fraction form
    479,542.95/661,362.98 = 288,520.65/x
  3. Step 3: Cross multiply
    479,542.95x = 661,362.98 × 288,520.65
  4. Step 4: Simplify right side
    479,542.95x = 190,816,875,432.93
  5. Step 5: Solve for x
    x = 190,816,875,432.93/479,542.95
  6. Step 6: Final answer
    x = 397,914.05

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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.