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Finding the Fourth Proportional to 260,015.70, 390,061.35 and 110,255.70

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Solution

The fourth proportional to 260,015.70, 390,061.35 and 110,255.70 is: 165,399.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,015.70 : 390,061.35 = 110,255.70 : x
  2. Step 2: Convert to fraction form
    260,015.70/390,061.35 = 110,255.70/x
  3. Step 3: Cross multiply
    260,015.70x = 390,061.35 × 110,255.70
  4. Step 4: Simplify right side
    260,015.70x = 43,006,487,187.20
  5. Step 5: Solve for x
    x = 43,006,487,187.20/260,015.70
  6. Step 6: Final answer
    x = 165,399.58

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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.