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Finding the Fourth Proportional to 455,458.86, 628,538.22 and 251,509.50

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Solution

The fourth proportional to 455,458.86, 628,538.22 and 251,509.50 is: 347,085.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    455,458.86 : 628,538.22 = 251,509.50 : x
  2. Step 2: Convert to fraction form
    455,458.86/628,538.22 = 251,509.50/x
  3. Step 3: Cross multiply
    455,458.86x = 628,538.22 × 251,509.50
  4. Step 4: Simplify right side
    455,458.86x = 158,083,333,443.09
  5. Step 5: Solve for x
    x = 158,083,333,443.09/455,458.86
  6. Step 6: Final answer
    x = 347,085.87

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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.