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Finding the Fourth Proportional to 303,451.10, 455,031.25 and 143,393.82

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Solution

The fourth proportional to 303,451.10, 455,031.25 and 143,393.82 is: 215,022.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    303,451.10 : 455,031.25 = 143,393.82 : x
  2. Step 2: Convert to fraction form
    303,451.10/455,031.25 = 143,393.82/x
  3. Step 3: Cross multiply
    303,451.10x = 455,031.25 × 143,393.82
  4. Step 4: Simplify right side
    303,451.10x = 65,248,669,156.88
  5. Step 5: Solve for x
    x = 65,248,669,156.88/303,451.10
  6. Step 6: Final answer
    x = 215,022.02

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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.