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Finding the Fourth Proportional to 421,609.28, 581,657.40 and 268,620.08

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Solution

The fourth proportional to 421,609.28, 581,657.40 and 268,620.08 is: 370,591.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    421,609.28 : 581,657.40 = 268,620.08 : x
  2. Step 2: Convert to fraction form
    421,609.28/581,657.40 = 268,620.08/x
  3. Step 3: Cross multiply
    421,609.28x = 581,657.40 × 268,620.08
  4. Step 4: Simplify right side
    421,609.28x = 156,244,857,320.59
  5. Step 5: Solve for x
    x = 156,244,857,320.59/421,609.28
  6. Step 6: Final answer
    x = 370,591.60

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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.