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Finding the Fourth Proportional to 286,234.70, 429,352.05 and 86,585.90

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Solution

The fourth proportional to 286,234.70, 429,352.05 and 86,585.90 is: 129,878.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    286,234.70 : 429,352.05 = 86,585.90 : x
  2. Step 2: Convert to fraction form
    286,234.70/429,352.05 = 86,585.90/x
  3. Step 3: Cross multiply
    286,234.70x = 429,352.05 × 86,585.90
  4. Step 4: Simplify right side
    286,234.70x = 37,175,833,666.10
  5. Step 5: Solve for x
    x = 37,175,833,666.10/286,234.70
  6. Step 6: Final answer
    x = 129,878.85

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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.