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Finding the Fourth Proportional to 381,441.60, 572,421.60 and 212,961.60

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Solution

The fourth proportional to 381,441.60, 572,421.60 and 212,961.60 is: 319,587.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    381,441.60 : 572,421.60 = 212,961.60 : x
  2. Step 2: Convert to fraction form
    381,441.60/572,421.60 = 212,961.60/x
  3. Step 3: Cross multiply
    381,441.60x = 572,421.60 × 212,961.60
  4. Step 4: Simplify right side
    381,441.60x = 121,903,819,810.56
  5. Step 5: Solve for x
    x = 121,903,819,810.56/381,441.60
  6. Step 6: Final answer
    x = 319,587.11

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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.