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Finding the Fourth Proportional to 1,108,936.60, 1,663,404.90 and 829,000.60

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Solution

The fourth proportional to 1,108,936.60, 1,663,404.90 and 829,000.60 is: 1,243,500.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,108,936.60 : 1,663,404.90 = 829,000.60 : x
  2. Step 2: Convert to fraction form
    1,108,936.60/1,663,404.90 = 829,000.60/x
  3. Step 3: Cross multiply
    1,108,936.60x = 1,663,404.90 × 829,000.60
  4. Step 4: Simplify right side
    1,108,936.60x = 1,378,963,660,142.94
  5. Step 5: Solve for x
    x = 1,378,963,660,142.94/1,108,936.60
  6. Step 6: Final answer
    x = 1,243,500.90

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Similar ratio
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1.5x scale

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.