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Finding the Fourth Proportional to 455,658.74, 628,755.17 and 251,697.42

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Solution

The fourth proportional to 455,658.74, 628,755.17 and 251,697.42 is: 347,312.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    455,658.74 : 628,755.17 = 251,697.42 : x
  2. Step 2: Convert to fraction form
    455,658.74/628,755.17 = 251,697.42/x
  3. Step 3: Cross multiply
    455,658.74x = 628,755.17 × 251,697.42
  4. Step 4: Simplify right side
    455,658.74x = 158,256,052,842.17
  5. Step 5: Solve for x
    x = 158,256,052,842.17/455,658.74
  6. Step 6: Final answer
    x = 347,312.67

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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.