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Finding the Fourth Proportional to 391,114.47, 539,745.63 and 255,235.35

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Solution

The fourth proportional to 391,114.47, 539,745.63 and 255,235.35 is: 352,229.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,114.47 : 539,745.63 = 255,235.35 : x
  2. Step 2: Convert to fraction form
    391,114.47/539,745.63 = 255,235.35/x
  3. Step 3: Cross multiply
    391,114.47x = 539,745.63 × 255,235.35
  4. Step 4: Simplify right side
    391,114.47x = 137,762,164,784.02
  5. Step 5: Solve for x
    x = 137,762,164,784.02/391,114.47
  6. Step 6: Final answer
    x = 352,229.78

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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.