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Finding the Fourth Proportional to 391,111.83, 539,734.55 and 212,263.83

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Solution

The fourth proportional to 391,111.83, 539,734.55 and 212,263.83 is: 292,924.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,111.83 : 539,734.55 = 212,263.83 : x
  2. Step 2: Convert to fraction form
    391,111.83/539,734.55 = 212,263.83/x
  3. Step 3: Cross multiply
    391,111.83x = 539,734.55 × 212,263.83
  4. Step 4: Simplify right side
    391,111.83x = 114,566,121,705.01
  5. Step 5: Solve for x
    x = 114,566,121,705.01/391,111.83
  6. Step 6: Final answer
    x = 292,924.20

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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.