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Finding the Fourth Proportional to 260,403.52, 390,642.42 and 80,504.44

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Solution

The fourth proportional to 260,403.52, 390,642.42 and 80,504.44 is: 120,768.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,403.52 : 390,642.42 = 80,504.44 : x
  2. Step 2: Convert to fraction form
    260,403.52/390,642.42 = 80,504.44/x
  3. Step 3: Cross multiply
    260,403.52x = 390,642.42 × 80,504.44
  4. Step 4: Simplify right side
    260,403.52x = 31,448,449,262.34
  5. Step 5: Solve for x
    x = 31,448,449,262.34/260,403.52
  6. Step 6: Final answer
    x = 120,768.14

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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.