Home / 289,981.80-434,972.70-261,988.20

Finding the Fourth Proportional to 289,981.80, 434,972.70 and 261,988.20

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Solution

The fourth proportional to 289,981.80, 434,972.70 and 261,988.20 is: 392,982.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,981.80 : 434,972.70 = 261,988.20 : x
  2. Step 2: Convert to fraction form
    289,981.80/434,972.70 = 261,988.20/x
  3. Step 3: Cross multiply
    289,981.80x = 434,972.70 × 261,988.20
  4. Step 4: Simplify right side
    289,981.80x = 113,957,714,722.14
  5. Step 5: Solve for x
    x = 113,957,714,722.14/289,981.80
  6. Step 6: Final answer
    x = 392,982.30

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Similar ratio
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1.5x scale

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.