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Finding the Fourth Proportional to 391,039.16, 539,632.14 and 212,191.16

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Solution

The fourth proportional to 391,039.16, 539,632.14 and 212,191.16 is: 292,822.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,039.16 : 539,632.14 = 212,191.16 : x
  2. Step 2: Convert to fraction form
    391,039.16/539,632.14 = 212,191.16/x
  3. Step 3: Cross multiply
    391,039.16x = 539,632.14 × 212,191.16
  4. Step 4: Simplify right side
    391,039.16x = 114,505,169,759.88
  5. Step 5: Solve for x
    x = 114,505,169,759.88/391,039.16
  6. Step 6: Final answer
    x = 292,822.77

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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.