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Finding the Fourth Proportional to 385,993.60, 532,671.06 and 211,562.80

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Solution

The fourth proportional to 385,993.60, 532,671.06 and 211,562.80 is: 291,956.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    385,993.60 : 532,671.06 = 211,562.80 : x
  2. Step 2: Convert to fraction form
    385,993.60/532,671.06 = 211,562.80/x
  3. Step 3: Cross multiply
    385,993.60x = 532,671.06 × 211,562.80
  4. Step 4: Simplify right side
    385,993.60x = 112,693,380,932.57
  5. Step 5: Solve for x
    x = 112,693,380,932.57/385,993.60
  6. Step 6: Final answer
    x = 291,956.60

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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.