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Finding the Fourth Proportional to 289,834.80, 434,881.80 and 102,980.40

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Solution

The fourth proportional to 289,834.80, 434,881.80 and 102,980.40 is: 154,516.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,834.80 : 434,881.80 = 102,980.40 : x
  2. Step 2: Convert to fraction form
    289,834.80/434,881.80 = 102,980.40/x
  3. Step 3: Cross multiply
    289,834.80x = 434,881.80 × 102,980.40
  4. Step 4: Simplify right side
    289,834.80x = 44,784,301,716.72
  5. Step 5: Solve for x
    x = 44,784,301,716.72/289,834.80
  6. Step 6: Final answer
    x = 154,516.65

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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.