Home / 289,389.40-434,198.38-89,725.48

Finding the Fourth Proportional to 289,389.40, 434,198.38 and 89,725.48

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Solution

The fourth proportional to 289,389.40, 434,198.38 and 89,725.48 is: 134,623.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,389.40 : 434,198.38 = 89,725.48 : x
  2. Step 2: Convert to fraction form
    289,389.40/434,198.38 = 89,725.48/x
  3. Step 3: Cross multiply
    289,389.40x = 434,198.38 × 89,725.48
  4. Step 4: Simplify right side
    289,389.40x = 38,958,658,060.72
  5. Step 5: Solve for x
    x = 38,958,658,060.72/289,389.40
  6. Step 6: Final answer
    x = 134,623.65

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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.