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Finding the Fourth Proportional to 215,903.80, 323,855.70 and 156,460.60

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Solution

The fourth proportional to 215,903.80, 323,855.70 and 156,460.60 is: 234,690.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    215,903.80 : 323,855.70 = 156,460.60 : x
  2. Step 2: Convert to fraction form
    215,903.80/323,855.70 = 156,460.60/x
  3. Step 3: Cross multiply
    215,903.80x = 323,855.70 × 156,460.60
  4. Step 4: Simplify right side
    215,903.80x = 50,670,657,135.42
  5. Step 5: Solve for x
    x = 50,670,657,135.42/215,903.80
  6. Step 6: Final answer
    x = 234,690.90

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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.