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Finding the Fourth Proportional to 455,330.88, 628,356.78 and 251,381.97

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Solution

The fourth proportional to 455,330.88, 628,356.78 and 251,381.97 is: 346,907.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    455,330.88 : 628,356.78 = 251,381.97 : x
  2. Step 2: Convert to fraction form
    455,330.88/628,356.78 = 251,381.97/x
  3. Step 3: Cross multiply
    455,330.88x = 628,356.78 × 251,381.97
  4. Step 4: Simplify right side
    455,330.88x = 157,957,565,219.26
  5. Step 5: Solve for x
    x = 157,957,565,219.26/455,330.88
  6. Step 6: Final answer
    x = 346,907.21

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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.