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Finding the Fourth Proportional to 289,990.40, 435,154.96 and 121,496.34

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Solution

The fourth proportional to 289,990.40, 435,154.96 and 121,496.34 is: 182,315.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,990.40 : 435,154.96 = 121,496.34 : x
  2. Step 2: Convert to fraction form
    289,990.40/435,154.96 = 121,496.34/x
  3. Step 3: Cross multiply
    289,990.40x = 435,154.96 × 121,496.34
  4. Step 4: Simplify right side
    289,990.40x = 52,869,734,972.85
  5. Step 5: Solve for x
    x = 52,869,734,972.85/289,990.40
  6. Step 6: Final answer
    x = 182,315.47

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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.