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Finding the Fourth Proportional to 283,399.77, 391,089.27 and 156,072.63

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Solution

The fourth proportional to 283,399.77, 391,089.27 and 156,072.63 is: 215,378.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    283,399.77 : 391,089.27 = 156,072.63 : x
  2. Step 2: Convert to fraction form
    283,399.77/391,089.27 = 156,072.63/x
  3. Step 3: Cross multiply
    283,399.77x = 391,089.27 × 156,072.63
  4. Step 4: Simplify right side
    283,399.77x = 61,038,330,933.68
  5. Step 5: Solve for x
    x = 61,038,330,933.68/283,399.77
  6. Step 6: Final answer
    x = 215,378.90

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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.