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Finding the Fourth Proportional to 391,054.95, 539,655.83 and 212,206.95

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Solution

The fourth proportional to 391,054.95, 539,655.83 and 212,206.95 is: 292,845.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,054.95 : 539,655.83 = 212,206.95 : x
  2. Step 2: Convert to fraction form
    391,054.95/539,655.83 = 212,206.95/x
  3. Step 3: Cross multiply
    391,054.95x = 539,655.83 × 212,206.95
  4. Step 4: Simplify right side
    391,054.95x = 114,518,717,734.02
  5. Step 5: Solve for x
    x = 114,518,717,734.02/391,054.95
  6. Step 6: Final answer
    x = 292,845.59

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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.