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Finding the Fourth Proportional to 289,763.40, 434,645.10 and 209,929.80

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Solution

The fourth proportional to 289,763.40, 434,645.10 and 209,929.80 is: 314,894.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,763.40 : 434,645.10 = 209,929.80 : x
  2. Step 2: Convert to fraction form
    289,763.40/434,645.10 = 209,929.80/x
  3. Step 3: Cross multiply
    289,763.40x = 434,645.10 × 209,929.80
  4. Step 4: Simplify right side
    289,763.40x = 91,244,958,913.98
  5. Step 5: Solve for x
    x = 91,244,958,913.98/289,763.40
  6. Step 6: Final answer
    x = 314,894.70

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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.