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Finding the Fourth Proportional to 399,640.30, 599,460.45 and 366,981.10

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Solution

The fourth proportional to 399,640.30, 599,460.45 and 366,981.10 is: 550,471.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,640.30 : 599,460.45 = 366,981.10 : x
  2. Step 2: Convert to fraction form
    399,640.30/599,460.45 = 366,981.10/x
  3. Step 3: Cross multiply
    399,640.30x = 599,460.45 × 366,981.10
  4. Step 4: Simplify right side
    399,640.30x = 219,990,655,347.50
  5. Step 5: Solve for x
    x = 219,990,655,347.50/399,640.30
  6. Step 6: Final answer
    x = 550,471.65

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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.