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Finding the Fourth Proportional to 455,317.31, 628,338.69 and 251,368.56

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Solution

The fourth proportional to 455,317.31, 628,338.69 and 251,368.56 is: 346,889.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    455,317.31 : 628,338.69 = 251,368.56 : x
  2. Step 2: Convert to fraction form
    455,317.31/628,338.69 = 251,368.56/x
  3. Step 3: Cross multiply
    455,317.31x = 628,338.69 × 251,368.56
  4. Step 4: Simplify right side
    455,317.31x = 157,944,593,155.52
  5. Step 5: Solve for x
    x = 157,944,593,155.52/455,317.31
  6. Step 6: Final answer
    x = 346,889.06

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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.