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Finding the Fourth Proportional to 518,987.80, 778,919.10 and 235,115.20

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Solution

The fourth proportional to 518,987.80, 778,919.10 and 235,115.20 is: 352,870.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,987.80 : 778,919.10 = 235,115.20 : x
  2. Step 2: Convert to fraction form
    518,987.80/778,919.10 = 235,115.20/x
  3. Step 3: Cross multiply
    518,987.80x = 778,919.10 × 235,115.20
  4. Step 4: Simplify right side
    518,987.80x = 183,135,719,980.32
  5. Step 5: Solve for x
    x = 183,135,719,980.32/518,987.80
  6. Step 6: Final answer
    x = 352,870.95

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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.