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Finding the Fourth Proportional to 455,381.47, 628,393.98 and 251,399.44

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Solution

The fourth proportional to 455,381.47, 628,393.98 and 251,399.44 is: 346,913.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    455,381.47 : 628,393.98 = 251,399.44 : x
  2. Step 2: Convert to fraction form
    455,381.47/628,393.98 = 251,399.44/x
  3. Step 3: Cross multiply
    455,381.47x = 628,393.98 × 251,399.44
  4. Step 4: Simplify right side
    455,381.47x = 157,977,894,671.37
  5. Step 5: Solve for x
    x = 157,977,894,671.37/455,381.47
  6. Step 6: Final answer
    x = 346,913.31

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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.