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Finding the Fourth Proportional to 283,688.72, 391,493.16 and 156,369.20

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Solution

The fourth proportional to 283,688.72, 391,493.16 and 156,369.20 is: 215,791.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    283,688.72 : 391,493.16 = 156,369.20 : x
  2. Step 2: Convert to fraction form
    283,688.72/391,493.16 = 156,369.20/x
  3. Step 3: Cross multiply
    283,688.72x = 391,493.16 × 156,369.20
  4. Step 4: Simplify right side
    283,688.72x = 61,217,472,234.67
  5. Step 5: Solve for x
    x = 61,217,472,234.67/283,688.72
  6. Step 6: Final answer
    x = 215,791.00

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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.