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Finding the Fourth Proportional to 260,613.76, 390,949.79 and 83,079.58

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Solution

The fourth proportional to 260,613.76, 390,949.79 and 83,079.58 is: 124,628.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,613.76 : 390,949.79 = 83,079.58 : x
  2. Step 2: Convert to fraction form
    260,613.76/390,949.79 = 83,079.58/x
  3. Step 3: Cross multiply
    260,613.76x = 390,949.79 × 83,079.58
  4. Step 4: Simplify right side
    260,613.76x = 32,479,944,354.29
  5. Step 5: Solve for x
    x = 32,479,944,354.29/260,613.76
  6. Step 6: Final answer
    x = 124,628.66

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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.