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Finding the Fourth Proportional to 289,696.80, 434,545.20 and 261,703.20

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Solution

The fourth proportional to 289,696.80, 434,545.20 and 261,703.20 is: 392,554.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,696.80 : 434,545.20 = 261,703.20 : x
  2. Step 2: Convert to fraction form
    289,696.80/434,545.20 = 261,703.20/x
  3. Step 3: Cross multiply
    289,696.80x = 434,545.20 × 261,703.20
  4. Step 4: Simplify right side
    289,696.80x = 113,721,869,384.64
  5. Step 5: Solve for x
    x = 113,721,869,384.64/289,696.80
  6. Step 6: Final answer
    x = 392,554.80

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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.