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Finding the Fourth Proportional to 455,351.15, 628,381.65 and 251,414.78

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Solution

The fourth proportional to 455,351.15, 628,381.65 and 251,414.78 is: 346,950.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    455,351.15 : 628,381.65 = 251,414.78 : x
  2. Step 2: Convert to fraction form
    455,351.15/628,381.65 = 251,414.78/x
  3. Step 3: Cross multiply
    455,351.15x = 628,381.65 × 251,414.78
  4. Step 4: Simplify right side
    455,351.15x = 157,984,434,290.79
  5. Step 5: Solve for x
    x = 157,984,434,290.79/455,351.15
  6. Step 6: Final answer
    x = 346,950.77

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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.