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Finding the Fourth Proportional to 381,437.60, 572,415.60 and 212,957.60

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Solution

The fourth proportional to 381,437.60, 572,415.60 and 212,957.60 is: 319,581.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    381,437.60 : 572,415.60 = 212,957.60 : x
  2. Step 2: Convert to fraction form
    381,437.60/572,415.60 = 212,957.60/x
  3. Step 3: Cross multiply
    381,437.60x = 572,415.60 × 212,957.60
  4. Step 4: Simplify right side
    381,437.60x = 121,900,252,378.56
  5. Step 5: Solve for x
    x = 121,900,252,378.56/381,437.60
  6. Step 6: Final answer
    x = 319,581.11

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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.