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Finding the Fourth Proportional to 455,431.86, 628,492.77 and 251,495.46

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Solution

The fourth proportional to 455,431.86, 628,492.77 and 251,495.46 is: 347,061.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    455,431.86 : 628,492.77 = 251,495.46 : x
  2. Step 2: Convert to fraction form
    455,431.86/628,492.77 = 251,495.46/x
  3. Step 3: Cross multiply
    455,431.86x = 628,492.77 × 251,495.46
  4. Step 4: Simplify right side
    455,431.86x = 158,063,078,297.82
  5. Step 5: Solve for x
    x = 158,063,078,297.82/455,431.86
  6. Step 6: Final answer
    x = 347,061.97

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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.