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Finding the Fourth Proportional to 330,330.78, 455,422.70 and 238,372.89

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Solution

The fourth proportional to 330,330.78, 455,422.70 and 238,372.89 is: 328,641.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    330,330.78 : 455,422.70 = 238,372.89 : x
  2. Step 2: Convert to fraction form
    330,330.78/455,422.70 = 238,372.89/x
  3. Step 3: Cross multiply
    330,330.78x = 455,422.70 × 238,372.89
  4. Step 4: Simplify right side
    330,330.78x = 108,560,423,978.74
  5. Step 5: Solve for x
    x = 108,560,423,978.74/330,330.78
  6. Step 6: Final answer
    x = 328,641.56

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1.5x scale

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.