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Finding the Fourth Proportional to 518,793.30, 778,189.95 and 318,464.10

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Solution

The fourth proportional to 518,793.30, 778,189.95 and 318,464.10 is: 477,696.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,793.30 : 778,189.95 = 318,464.10 : x
  2. Step 2: Convert to fraction form
    518,793.30/778,189.95 = 318,464.10/x
  3. Step 3: Cross multiply
    518,793.30x = 778,189.95 × 318,464.10
  4. Step 4: Simplify right side
    518,793.30x = 247,825,562,055.80
  5. Step 5: Solve for x
    x = 247,825,562,055.80/518,793.30
  6. Step 6: Final answer
    x = 477,696.15

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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.