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Finding the Fourth Proportional to 512,054.76, 768,081.28 and 212,335.32

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Solution

The fourth proportional to 512,054.76, 768,081.28 and 212,335.32 is: 318,502.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    512,054.76 : 768,081.28 = 212,335.32 : x
  2. Step 2: Convert to fraction form
    512,054.76/768,081.28 = 212,335.32/x
  3. Step 3: Cross multiply
    512,054.76x = 768,081.28 × 212,335.32
  4. Step 4: Simplify right side
    512,054.76x = 163,090,784,374.81
  5. Step 5: Solve for x
    x = 163,090,784,374.81/512,054.76
  6. Step 6: Final answer
    x = 318,502.62

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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.