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Finding the Fourth Proportional to 398,604.78, 549,763.56 and 255,378.24

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Solution

The fourth proportional to 398,604.78, 549,763.56 and 255,378.24 is: 352,222.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,604.78 : 549,763.56 = 255,378.24 : x
  2. Step 2: Convert to fraction form
    398,604.78/549,763.56 = 255,378.24/x
  3. Step 3: Cross multiply
    398,604.78x = 549,763.56 × 255,378.24
  4. Step 4: Simplify right side
    398,604.78x = 140,397,650,368.93
  5. Step 5: Solve for x
    x = 140,397,650,368.93/398,604.78
  6. Step 6: Final answer
    x = 352,222.70

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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.