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Finding the Fourth Proportional to 280,606.92, 386,736.84 and 212,460.72

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Solution

The fourth proportional to 280,606.92, 386,736.84 and 212,460.72 is: 292,816.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,606.92 : 386,736.84 = 212,460.72 : x
  2. Step 2: Convert to fraction form
    280,606.92/386,736.84 = 212,460.72/x
  3. Step 3: Cross multiply
    280,606.92x = 386,736.84 × 212,460.72
  4. Step 4: Simplify right side
    280,606.92x = 82,166,387,476.92
  5. Step 5: Solve for x
    x = 82,166,387,476.92/280,606.92
  6. Step 6: Final answer
    x = 292,816.68

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.