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Finding the Fourth Proportional to 289,802.40, 434,919.60 and 149,488.80

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Solution

The fourth proportional to 289,802.40, 434,919.60 and 149,488.80 is: 224,344.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,802.40 : 434,919.60 = 149,488.80 : x
  2. Step 2: Convert to fraction form
    289,802.40/434,919.60 = 149,488.80/x
  3. Step 3: Cross multiply
    289,802.40x = 434,919.60 × 149,488.80
  4. Step 4: Simplify right side
    289,802.40x = 65,015,609,100.48
  5. Step 5: Solve for x
    x = 65,015,609,100.48/289,802.40
  6. Step 6: Final answer
    x = 224,344.62

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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.