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Finding the Fourth Proportional to 809,657.40, 1,214,486.10 and 248,691.90

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Solution

The fourth proportional to 809,657.40, 1,214,486.10 and 248,691.90 is: 373,037.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    809,657.40 : 1,214,486.10 = 248,691.90 : x
  2. Step 2: Convert to fraction form
    809,657.40/1,214,486.10 = 248,691.90/x
  3. Step 3: Cross multiply
    809,657.40x = 1,214,486.10 × 248,691.90
  4. Step 4: Simplify right side
    809,657.40x = 302,032,855,732.59
  5. Step 5: Solve for x
    x = 302,032,855,732.59/809,657.40
  6. Step 6: Final answer
    x = 373,037.85

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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.