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Finding the Fourth Proportional to 479,724.50, 662,078.13 and 278,520.50

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Solution

The fourth proportional to 479,724.50, 662,078.13 and 278,520.50 is: 384,392.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    479,724.50 : 662,078.13 = 278,520.50 : x
  2. Step 2: Convert to fraction form
    479,724.50/662,078.13 = 278,520.50/x
  3. Step 3: Cross multiply
    479,724.50x = 662,078.13 × 278,520.50
  4. Step 4: Simplify right side
    479,724.50x = 184,402,331,806.67
  5. Step 5: Solve for x
    x = 184,402,331,806.67/479,724.50
  6. Step 6: Final answer
    x = 384,392.15

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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.