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Finding the Fourth Proportional to 255,886.22, 383,844.51 and 78,394.97

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Solution

The fourth proportional to 255,886.22, 383,844.51 and 78,394.97 is: 117,597.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    255,886.22 : 383,844.51 = 78,394.97 : x
  2. Step 2: Convert to fraction form
    255,886.22/383,844.51 = 78,394.97/x
  3. Step 3: Cross multiply
    255,886.22x = 383,844.51 × 78,394.97
  4. Step 4: Simplify right side
    255,886.22x = 30,091,476,926.89
  5. Step 5: Solve for x
    x = 30,091,476,926.89/255,886.22
  6. Step 6: Final answer
    x = 117,597.10

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.