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Finding the Fourth Proportional to 483,673.38, 725,497.65 and 128,690.40

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Solution

The fourth proportional to 483,673.38, 725,497.65 and 128,690.40 is: 193,032.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    483,673.38 : 725,497.65 = 128,690.40 : x
  2. Step 2: Convert to fraction form
    483,673.38/725,497.65 = 128,690.40/x
  3. Step 3: Cross multiply
    483,673.38x = 725,497.65 × 128,690.40
  4. Step 4: Simplify right side
    483,673.38x = 93,364,582,777.56
  5. Step 5: Solve for x
    x = 93,364,582,777.56/483,673.38
  6. Step 6: Final answer
    x = 193,032.30

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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.