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Finding the Fourth Proportional to 398,606.78, 549,766.32 and 255,380.24

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Solution

The fourth proportional to 398,606.78, 549,766.32 and 255,380.24 is: 352,225.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,606.78 : 549,766.32 = 255,380.24 : x
  2. Step 2: Convert to fraction form
    398,606.78/549,766.32 = 255,380.24/x
  3. Step 3: Cross multiply
    398,606.78x = 549,766.32 × 255,380.24
  4. Step 4: Simplify right side
    398,606.78x = 140,399,454,745.52
  5. Step 5: Solve for x
    x = 140,399,454,745.52/398,606.78
  6. Step 6: Final answer
    x = 352,225.46

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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.