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Finding the Fourth Proportional to 549,286.80, 823,930.20 and 338,240.40

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Solution

The fourth proportional to 549,286.80, 823,930.20 and 338,240.40 is: 507,360.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    549,286.80 : 823,930.20 = 338,240.40 : x
  2. Step 2: Convert to fraction form
    549,286.80/823,930.20 = 338,240.40/x
  3. Step 3: Cross multiply
    549,286.80x = 823,930.20 × 338,240.40
  4. Step 4: Simplify right side
    549,286.80x = 278,686,480,420.08
  5. Step 5: Solve for x
    x = 278,686,480,420.08/549,286.80
  6. Step 6: Final answer
    x = 507,360.60

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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.