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Finding the Fourth Proportional to 260,018.40, 389,720.40 and 110,258.40

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Solution

The fourth proportional to 260,018.40, 389,720.40 and 110,258.40 is: 165,257.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,018.40 : 389,720.40 = 110,258.40 : x
  2. Step 2: Convert to fraction form
    260,018.40/389,720.40 = 110,258.40/x
  3. Step 3: Cross multiply
    260,018.40x = 389,720.40 × 110,258.40
  4. Step 4: Simplify right side
    260,018.40x = 42,969,947,751.36
  5. Step 5: Solve for x
    x = 42,969,947,751.36/260,018.40
  6. Step 6: Final answer
    x = 165,257.33

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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.