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Finding the Fourth Proportional to 289,344.80, 434,017.20 and 89,664.80

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Solution

The fourth proportional to 289,344.80, 434,017.20 and 89,664.80 is: 134,497.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,344.80 : 434,017.20 = 89,664.80 : x
  2. Step 2: Convert to fraction form
    289,344.80/434,017.20 = 89,664.80/x
  3. Step 3: Cross multiply
    289,344.80x = 434,017.20 × 89,664.80
  4. Step 4: Simplify right side
    289,344.80x = 38,916,065,434.56
  5. Step 5: Solve for x
    x = 38,916,065,434.56/289,344.80
  6. Step 6: Final answer
    x = 134,497.20

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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.