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Finding the Fourth Proportional to 260,856.58, 391,211.06 and 118,622.30

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Solution

The fourth proportional to 260,856.58, 391,211.06 and 118,622.30 is: 177,899.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,856.58 : 391,211.06 = 118,622.30 : x
  2. Step 2: Convert to fraction form
    260,856.58/391,211.06 = 118,622.30/x
  3. Step 3: Cross multiply
    260,856.58x = 391,211.06 × 118,622.30
  4. Step 4: Simplify right side
    260,856.58x = 46,406,353,173.47
  5. Step 5: Solve for x
    x = 46,406,353,173.47/260,856.58
  6. Step 6: Final answer
    x = 177,899.88

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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.