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Finding the Fourth Proportional to 493,612.30, 681,111.48 and 278,748.10

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Solution

The fourth proportional to 493,612.30, 681,111.48 and 278,748.10 is: 384,630.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    493,612.30 : 681,111.48 = 278,748.10 : x
  2. Step 2: Convert to fraction form
    493,612.30/681,111.48 = 278,748.10/x
  3. Step 3: Cross multiply
    493,612.30x = 681,111.48 × 278,748.10
  4. Step 4: Simplify right side
    493,612.30x = 189,858,530,938.19
  5. Step 5: Solve for x
    x = 189,858,530,938.19/493,612.30
  6. Step 6: Final answer
    x = 384,630.88

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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.