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Finding the Fourth Proportional to 330,648.72, 455,860.56 and 238,690.48

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Solution

The fourth proportional to 330,648.72, 455,860.56 and 238,690.48 is: 329,079.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    330,648.72 : 455,860.56 = 238,690.48 : x
  2. Step 2: Convert to fraction form
    330,648.72/455,860.56 = 238,690.48/x
  3. Step 3: Cross multiply
    330,648.72x = 455,860.56 × 238,690.48
  4. Step 4: Simplify right side
    330,648.72x = 108,809,575,879.47
  5. Step 5: Solve for x
    x = 108,809,575,879.47/330,648.72
  6. Step 6: Final answer
    x = 329,079.08

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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.