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Finding the Fourth Proportional to 518,698.80, 778,048.20 and 324,007.20

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Solution

The fourth proportional to 518,698.80, 778,048.20 and 324,007.20 is: 486,010.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,698.80 : 778,048.20 = 324,007.20 : x
  2. Step 2: Convert to fraction form
    518,698.80/778,048.20 = 324,007.20/x
  3. Step 3: Cross multiply
    518,698.80x = 778,048.20 × 324,007.20
  4. Step 4: Simplify right side
    518,698.80x = 252,093,218,747.04
  5. Step 5: Solve for x
    x = 252,093,218,747.04/518,698.80
  6. Step 6: Final answer
    x = 486,010.80

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Double scale
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Similar ratio
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1.5x scale

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.