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Finding the Fourth Proportional to 215,875.80, 323,813.70 and 189,631.80

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Solution

The fourth proportional to 215,875.80, 323,813.70 and 189,631.80 is: 284,447.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    215,875.80 : 323,813.70 = 189,631.80 : x
  2. Step 2: Convert to fraction form
    215,875.80/323,813.70 = 189,631.80/x
  3. Step 3: Cross multiply
    215,875.80x = 323,813.70 × 189,631.80
  4. Step 4: Simplify right side
    215,875.80x = 61,405,374,795.66
  5. Step 5: Solve for x
    x = 61,405,374,795.66/215,875.80
  6. Step 6: Final answer
    x = 284,447.70

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.