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Finding the Fourth Proportional to 260,405.60, 390,768.48 and 120,174.56

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Solution

The fourth proportional to 260,405.60, 390,768.48 and 120,174.56 is: 180,335.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,405.60 : 390,768.48 = 120,174.56 : x
  2. Step 2: Convert to fraction form
    260,405.60/390,768.48 = 120,174.56/x
  3. Step 3: Cross multiply
    260,405.60x = 390,768.48 × 120,174.56
  4. Step 4: Simplify right side
    260,405.60x = 46,960,430,145.87
  5. Step 5: Solve for x
    x = 46,960,430,145.87/260,405.60
  6. Step 6: Final answer
    x = 180,335.72

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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.