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Finding the Fourth Proportional to 289,881.21, 434,817.77 and 100,479.45

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Solution

The fourth proportional to 289,881.21, 434,817.77 and 100,479.45 is: 150,717.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,881.21 : 434,817.77 = 100,479.45 : x
  2. Step 2: Convert to fraction form
    289,881.21/434,817.77 = 100,479.45/x
  3. Step 3: Cross multiply
    289,881.21x = 434,817.77 × 100,479.45
  4. Step 4: Simplify right side
    289,881.21x = 43,690,249,877.43
  5. Step 5: Solve for x
    x = 43,690,249,877.43/289,881.21
  6. Step 6: Final answer
    x = 150,717.77

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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.