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Finding the Fourth Proportional to 260,511.39, 390,759.80 and 83,029.05

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Solution

The fourth proportional to 260,511.39, 390,759.80 and 83,029.05 is: 124,541.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,511.39 : 390,759.80 = 83,029.05 : x
  2. Step 2: Convert to fraction form
    260,511.39/390,759.80 = 83,029.05/x
  3. Step 3: Cross multiply
    260,511.39x = 390,759.80 × 83,029.05
  4. Step 4: Simplify right side
    260,511.39x = 32,444,414,557.04
  5. Step 5: Solve for x
    x = 32,444,414,557.04/260,511.39
  6. Step 6: Final answer
    x = 124,541.25

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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.