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Finding the Fourth Proportional to 1,243,568.80, 1,865,353.20 and 994,736.80

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Solution

The fourth proportional to 1,243,568.80, 1,865,353.20 and 994,736.80 is: 1,492,105.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,243,568.80 : 1,865,353.20 = 994,736.80 : x
  2. Step 2: Convert to fraction form
    1,243,568.80/1,865,353.20 = 994,736.80/x
  3. Step 3: Cross multiply
    1,243,568.80x = 1,865,353.20 × 994,736.80
  4. Step 4: Simplify right side
    1,243,568.80x = 1,855,535,473,037.76
  5. Step 5: Solve for x
    x = 1,855,535,473,037.76/1,243,568.80
  6. Step 6: Final answer
    x = 1,492,105.20

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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.