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Finding the Fourth Proportional to 658,628.56, 908,528.40 and 396,802

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Solution

The fourth proportional to 658,628.56, 908,528.40 and 396,802 is: 547,358.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    658,628.56 : 908,528.40 = 396,802 : x
  2. Step 2: Convert to fraction form
    658,628.56/908,528.40 = 396,802/x
  3. Step 3: Cross multiply
    658,628.56x = 908,528.40 × 396,802
  4. Step 4: Simplify right side
    658,628.56x = 360,505,886,176.80
  5. Step 5: Solve for x
    x = 360,505,886,176.80/658,628.56
  6. Step 6: Final answer
    x = 547,358.42

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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.