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Finding the Fourth Proportional to 289,934.61, 434,797.71 and 100,343.54

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Solution

The fourth proportional to 289,934.61, 434,797.71 and 100,343.54 is: 150,479.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,934.61 : 434,797.71 = 100,343.54 : x
  2. Step 2: Convert to fraction form
    289,934.61/434,797.71 = 100,343.54/x
  3. Step 3: Cross multiply
    289,934.61x = 434,797.71 × 100,343.54
  4. Step 4: Simplify right side
    289,934.61x = 43,629,142,116.00
  5. Step 5: Solve for x
    x = 43,629,142,116.00/289,934.61
  6. Step 6: Final answer
    x = 150,479.25

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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.