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Finding the Fourth Proportional to 260,512.39, 390,761.30 and 83,030.05

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Solution

The fourth proportional to 260,512.39, 390,761.30 and 83,030.05 is: 124,542.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,512.39 : 390,761.30 = 83,030.05 : x
  2. Step 2: Convert to fraction form
    260,512.39/390,761.30 = 83,030.05/x
  3. Step 3: Cross multiply
    260,512.39x = 390,761.30 × 83,030.05
  4. Step 4: Simplify right side
    260,512.39x = 32,444,929,861.91
  5. Step 5: Solve for x
    x = 32,444,929,861.91/260,512.39
  6. Step 6: Final answer
    x = 124,542.75

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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.