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Finding the Fourth Proportional to 286,339.80, 429,400.35 and 86,593.80

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Solution

The fourth proportional to 286,339.80, 429,400.35 and 86,593.80 is: 129,857.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    286,339.80 : 429,400.35 = 86,593.80 : x
  2. Step 2: Convert to fraction form
    286,339.80/429,400.35 = 86,593.80/x
  3. Step 3: Cross multiply
    286,339.80x = 429,400.35 × 86,593.80
  4. Step 4: Simplify right side
    286,339.80x = 37,183,408,027.83
  5. Step 5: Solve for x
    x = 37,183,408,027.83/286,339.80
  6. Step 6: Final answer
    x = 129,857.63

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.