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Finding the Fourth Proportional to 215,865.80, 323,798.70 and 137,328.20

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Solution

The fourth proportional to 215,865.80, 323,798.70 and 137,328.20 is: 205,992.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    215,865.80 : 323,798.70 = 137,328.20 : x
  2. Step 2: Convert to fraction form
    215,865.80/323,798.70 = 137,328.20/x
  3. Step 3: Cross multiply
    215,865.80x = 323,798.70 × 137,328.20
  4. Step 4: Simplify right side
    215,865.80x = 44,466,692,633.34
  5. Step 5: Solve for x
    x = 44,466,692,633.34/215,865.80
  6. Step 6: Final answer
    x = 205,992.30

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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.