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Finding the Fourth Proportional to 303,311.71, 455,021.04 and 103,585.28

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Solution

The fourth proportional to 303,311.71, 455,021.04 and 103,585.28 is: 155,396.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    303,311.71 : 455,021.04 = 103,585.28 : x
  2. Step 2: Convert to fraction form
    303,311.71/455,021.04 = 103,585.28/x
  3. Step 3: Cross multiply
    303,311.71x = 455,021.04 × 103,585.28
  4. Step 4: Simplify right side
    303,311.71x = 47,133,481,834.29
  5. Step 5: Solve for x
    x = 47,133,481,834.29/303,311.71
  6. Step 6: Final answer
    x = 155,396.19

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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.