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Finding the Fourth Proportional to 420,454.82, 630,782.66 and 136,145.66

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Solution

The fourth proportional to 420,454.82, 630,782.66 and 136,145.66 is: 204,251.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,454.82 : 630,782.66 = 136,145.66 : x
  2. Step 2: Convert to fraction form
    420,454.82/630,782.66 = 136,145.66/x
  3. Step 3: Cross multiply
    420,454.82x = 630,782.66 × 136,145.66
  4. Step 4: Simplify right side
    420,454.82x = 85,878,323,479.58
  5. Step 5: Solve for x
    x = 85,878,323,479.58/420,454.82
  6. Step 6: Final answer
    x = 204,251.02

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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.