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Finding the Fourth Proportional to 505,061.84, 696,982.92 and 278,721.20

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Solution

The fourth proportional to 505,061.84, 696,982.92 and 278,721.20 is: 384,633.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    505,061.84 : 696,982.92 = 278,721.20 : x
  2. Step 2: Convert to fraction form
    505,061.84/696,982.92 = 278,721.20/x
  3. Step 3: Cross multiply
    505,061.84x = 696,982.92 × 278,721.20
  4. Step 4: Simplify right side
    505,061.84x = 194,263,915,841.90
  5. Step 5: Solve for x
    x = 194,263,915,841.90/505,061.84
  6. Step 6: Final answer
    x = 384,633.92

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Double scale
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Similar ratio
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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.