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Finding the Fourth Proportional to 680,098.68, 938,660.40 and 393,645.42

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Solution

The fourth proportional to 680,098.68, 938,660.40 and 393,645.42 is: 543,302.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    680,098.68 : 938,660.40 = 393,645.42 : x
  2. Step 2: Convert to fraction form
    680,098.68/938,660.40 = 393,645.42/x
  3. Step 3: Cross multiply
    680,098.68x = 938,660.40 × 393,645.42
  4. Step 4: Simplify right side
    680,098.68x = 369,499,367,395.37
  5. Step 5: Solve for x
    x = 369,499,367,395.37/680,098.68
  6. Step 6: Final answer
    x = 543,302.58

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.