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Finding the Fourth Proportional to 303,311.96, 455,021.42 and 103,585.53

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Solution

The fourth proportional to 303,311.96, 455,021.42 and 103,585.53 is: 155,396.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    303,311.96 : 455,021.42 = 103,585.53 : x
  2. Step 2: Convert to fraction form
    303,311.96/455,021.42 = 103,585.53/x
  3. Step 3: Cross multiply
    303,311.96x = 455,021.42 × 103,585.53
  4. Step 4: Simplify right side
    303,311.96x = 47,133,634,434.12
  5. Step 5: Solve for x
    x = 47,133,634,434.12/303,311.96
  6. Step 6: Final answer
    x = 155,396.56

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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.