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Finding the Fourth Proportional to 289,982.80, 434,974.20 and 103,013.20

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Solution

The fourth proportional to 289,982.80, 434,974.20 and 103,013.20 is: 154,519.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,982.80 : 434,974.20 = 103,013.20 : x
  2. Step 2: Convert to fraction form
    289,982.80/434,974.20 = 103,013.20/x
  3. Step 3: Cross multiply
    289,982.80x = 434,974.20 × 103,013.20
  4. Step 4: Simplify right side
    289,982.80x = 44,808,084,259.44
  5. Step 5: Solve for x
    x = 44,808,084,259.44/289,982.80
  6. Step 6: Final answer
    x = 154,519.80

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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.