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Finding the Fourth Proportional to 260,011.20, 390,054.60 and 110,251.20

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Solution

The fourth proportional to 260,011.20, 390,054.60 and 110,251.20 is: 165,392.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,011.20 : 390,054.60 = 110,251.20 : x
  2. Step 2: Convert to fraction form
    260,011.20/390,054.60 = 110,251.20/x
  3. Step 3: Cross multiply
    260,011.20x = 390,054.60 × 110,251.20
  4. Step 4: Simplify right side
    260,011.20x = 43,003,987,715.52
  5. Step 5: Solve for x
    x = 43,003,987,715.52/260,011.20
  6. Step 6: Final answer
    x = 165,392.83

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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.