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Finding the Fourth Proportional to 215,866.30, 323,799.45 and 137,328.70

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Solution

The fourth proportional to 215,866.30, 323,799.45 and 137,328.70 is: 205,993.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    215,866.30 : 323,799.45 = 137,328.70 : x
  2. Step 2: Convert to fraction form
    215,866.30/323,799.45 = 137,328.70/x
  3. Step 3: Cross multiply
    215,866.30x = 323,799.45 × 137,328.70
  4. Step 4: Simplify right side
    215,866.30x = 44,466,957,529.22
  5. Step 5: Solve for x
    x = 44,466,957,529.22/215,866.30
  6. Step 6: Final answer
    x = 205,993.05

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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.