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Finding the Fourth Proportional to 455,615.10, 628,754.87 and 251,665.50

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Solution

The fourth proportional to 455,615.10, 628,754.87 and 251,665.50 is: 347,301.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    455,615.10 : 628,754.87 = 251,665.50 : x
  2. Step 2: Convert to fraction form
    455,615.10/628,754.87 = 251,665.50/x
  3. Step 3: Cross multiply
    455,615.10x = 628,754.87 × 251,665.50
  4. Step 4: Simplify right side
    455,615.10x = 158,235,908,735.99
  5. Step 5: Solve for x
    x = 158,235,908,735.99/455,615.10
  6. Step 6: Final answer
    x = 347,301.72

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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.