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Finding the Fourth Proportional to 260,860.16, 391,305.60 and 73,856

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Solution

The fourth proportional to 260,860.16, 391,305.60 and 73,856 is: 110,788.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,860.16 : 391,305.60 = 73,856 : x
  2. Step 2: Convert to fraction form
    260,860.16/391,305.60 = 73,856/x
  3. Step 3: Cross multiply
    260,860.16x = 391,305.60 × 73,856
  4. Step 4: Simplify right side
    260,860.16x = 28,900,266,393.60
  5. Step 5: Solve for x
    x = 28,900,266,393.60/260,860.16
  6. Step 6: Final answer
    x = 110,788.35

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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.