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Finding the Fourth Proportional to 376,878.16, 520,067.40 and 215,734.48

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Solution

The fourth proportional to 376,878.16, 520,067.40 and 215,734.48 is: 297,699.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    376,878.16 : 520,067.40 = 215,734.48 : x
  2. Step 2: Convert to fraction form
    376,878.16/520,067.40 = 215,734.48/x
  3. Step 3: Cross multiply
    376,878.16x = 520,067.40 × 215,734.48
  4. Step 4: Simplify right side
    376,878.16x = 112,196,470,103.95
  5. Step 5: Solve for x
    x = 112,196,470,103.95/376,878.16
  6. Step 6: Final answer
    x = 297,699.58

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.