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Finding the Fourth Proportional to 391,059.95, 539,662.73 and 212,211.95

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Solution

The fourth proportional to 391,059.95, 539,662.73 and 212,211.95 is: 292,852.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,059.95 : 539,662.73 = 212,211.95 : x
  2. Step 2: Convert to fraction form
    391,059.95/539,662.73 = 212,211.95/x
  3. Step 3: Cross multiply
    391,059.95x = 539,662.73 × 212,211.95
  4. Step 4: Simplify right side
    391,059.95x = 114,522,876,516.25
  5. Step 5: Solve for x
    x = 114,522,876,516.25/391,059.95
  6. Step 6: Final answer
    x = 292,852.48

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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.