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Finding the Fourth Proportional to 398,191.40, 549,464.28 and 245,205.08

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Solution

The fourth proportional to 398,191.40, 549,464.28 and 245,205.08 is: 338,358.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,191.40 : 549,464.28 = 245,205.08 : x
  2. Step 2: Convert to fraction form
    398,191.40/549,464.28 = 245,205.08/x
  3. Step 3: Cross multiply
    398,191.40x = 549,464.28 × 245,205.08
  4. Step 4: Simplify right side
    398,191.40x = 134,731,432,734.54
  5. Step 5: Solve for x
    x = 134,731,432,734.54/398,191.40
  6. Step 6: Final answer
    x = 338,358.47

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.