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Finding the Fourth Proportional to 303,399.64, 455,153.46 and 103,742.20

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Solution

The fourth proportional to 303,399.64, 455,153.46 and 103,742.20 is: 155,631.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    303,399.64 : 455,153.46 = 103,742.20 : x
  2. Step 2: Convert to fraction form
    303,399.64/455,153.46 = 103,742.20/x
  3. Step 3: Cross multiply
    303,399.64x = 455,153.46 × 103,742.20
  4. Step 4: Simplify right side
    303,399.64x = 47,218,621,278.01
  5. Step 5: Solve for x
    x = 47,218,621,278.01/303,399.64
  6. Step 6: Final answer
    x = 155,631.76

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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.