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Finding the Fourth Proportional to 455,635.72, 628,774.78 and 251,700.64

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Solution

The fourth proportional to 455,635.72, 628,774.78 and 251,700.64 is: 347,345.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    455,635.72 : 628,774.78 = 251,700.64 : x
  2. Step 2: Convert to fraction form
    455,635.72/628,774.78 = 251,700.64/x
  3. Step 3: Cross multiply
    455,635.72x = 628,774.78 × 251,700.64
  4. Step 4: Simplify right side
    455,635.72x = 158,263,014,541.86
  5. Step 5: Solve for x
    x = 158,263,014,541.86/455,635.72
  6. Step 6: Final answer
    x = 347,345.49

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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.