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Finding the Fourth Proportional to 260,408.36, 390,612.54 and 82,969.76

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Solution

The fourth proportional to 260,408.36, 390,612.54 and 82,969.76 is: 124,454.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,408.36 : 390,612.54 = 82,969.76 : x
  2. Step 2: Convert to fraction form
    260,408.36/390,612.54 = 82,969.76/x
  3. Step 3: Cross multiply
    260,408.36x = 390,612.54 × 82,969.76
  4. Step 4: Simplify right side
    260,408.36x = 32,409,028,696.79
  5. Step 5: Solve for x
    x = 32,409,028,696.79/260,408.36
  6. Step 6: Final answer
    x = 124,454.64

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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.