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Finding the Fourth Proportional to 568,781.28, 784,911.60 and 310,656.96

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Solution

The fourth proportional to 568,781.28, 784,911.60 and 310,656.96 is: 428,703.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    568,781.28 : 784,911.60 = 310,656.96 : x
  2. Step 2: Convert to fraction form
    568,781.28/784,911.60 = 310,656.96/x
  3. Step 3: Cross multiply
    568,781.28x = 784,911.60 × 310,656.96
  4. Step 4: Simplify right side
    568,781.28x = 243,838,251,524.74
  5. Step 5: Solve for x
    x = 243,838,251,524.74/568,781.28
  6. Step 6: Final answer
    x = 428,703.02

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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.