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Finding the Fourth Proportional to 283,356.66, 391,018.16 and 156,008.46

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Solution

The fourth proportional to 283,356.66, 391,018.16 and 156,008.46 is: 215,283.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    283,356.66 : 391,018.16 = 156,008.46 : x
  2. Step 2: Convert to fraction form
    283,356.66/391,018.16 = 156,008.46/x
  3. Step 3: Cross multiply
    283,356.66x = 391,018.16 × 156,008.46
  4. Step 4: Simplify right side
    283,356.66x = 61,002,140,193.59
  5. Step 5: Solve for x
    x = 61,002,140,193.59/283,356.66
  6. Step 6: Final answer
    x = 215,283.95

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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.