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Finding the Fourth Proportional to 289,982.60, 434,973.90 and 102,969.80

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Solution

The fourth proportional to 289,982.60, 434,973.90 and 102,969.80 is: 154,454.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,982.60 : 434,973.90 = 102,969.80 : x
  2. Step 2: Convert to fraction form
    289,982.60/434,973.90 = 102,969.80/x
  3. Step 3: Cross multiply
    289,982.60x = 434,973.90 × 102,969.80
  4. Step 4: Simplify right side
    289,982.60x = 44,789,175,488.22
  5. Step 5: Solve for x
    x = 44,789,175,488.22/289,982.60
  6. Step 6: Final answer
    x = 154,454.70

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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.