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Finding the Fourth Proportional to 260,045.20, 390,105.60 and 110,285.20

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Solution

The fourth proportional to 260,045.20, 390,105.60 and 110,285.20 is: 165,443.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,045.20 : 390,105.60 = 110,285.20 : x
  2. Step 2: Convert to fraction form
    260,045.20/390,105.60 = 110,285.20/x
  3. Step 3: Cross multiply
    260,045.20x = 390,105.60 × 110,285.20
  4. Step 4: Simplify right side
    260,045.20x = 43,022,874,117.12
  5. Step 5: Solve for x
    x = 43,022,874,117.12/260,045.20
  6. Step 6: Final answer
    x = 165,443.83

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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.