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Finding the Fourth Proportional to 398,571.78, 549,718.02 and 255,345.15

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Solution

The fourth proportional to 398,571.78, 549,718.02 and 255,345.15 is: 352,177.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,571.78 : 549,718.02 = 255,345.15 : x
  2. Step 2: Convert to fraction form
    398,571.78/549,718.02 = 255,345.15/x
  3. Step 3: Cross multiply
    398,571.78x = 549,718.02 × 255,345.15
  4. Step 4: Simplify right side
    398,571.78x = 140,367,830,274.60
  5. Step 5: Solve for x
    x = 140,367,830,274.60/398,571.78
  6. Step 6: Final answer
    x = 352,177.04

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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.