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Finding the Fourth Proportional to 518,798.40, 778,110.12 and 198,796.56

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Solution

The fourth proportional to 518,798.40, 778,110.12 and 198,796.56 is: 298,161.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,798.40 : 778,110.12 = 198,796.56 : x
  2. Step 2: Convert to fraction form
    518,798.40/778,110.12 = 198,796.56/x
  3. Step 3: Cross multiply
    518,798.40x = 778,110.12 × 198,796.56
  4. Step 4: Simplify right side
    518,798.40x = 154,685,615,157.19
  5. Step 5: Solve for x
    x = 154,685,615,157.19/518,798.40
  6. Step 6: Final answer
    x = 298,161.32

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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.