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Finding the Fourth Proportional to 260,814.60, 390,930.30 and 111,029.40

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Solution

The fourth proportional to 260,814.60, 390,930.30 and 111,029.40 is: 166,419.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,814.60 : 390,930.30 = 111,029.40 : x
  2. Step 2: Convert to fraction form
    260,814.60/390,930.30 = 111,029.40/x
  3. Step 3: Cross multiply
    260,814.60x = 390,930.30 × 111,029.40
  4. Step 4: Simplify right side
    260,814.60x = 43,404,756,650.82
  5. Step 5: Solve for x
    x = 43,404,756,650.82/260,814.60
  6. Step 6: Final answer
    x = 166,419.97

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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.