Home / 289,421.12-434,279.76-137,789.63

Finding the Fourth Proportional to 289,421.12, 434,279.76 and 137,789.63

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Solution

The fourth proportional to 289,421.12, 434,279.76 and 137,789.63 is: 206,754.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,421.12 : 434,279.76 = 137,789.63 : x
  2. Step 2: Convert to fraction form
    289,421.12/434,279.76 = 137,789.63/x
  3. Step 3: Cross multiply
    289,421.12x = 434,279.76 × 137,789.63
  4. Step 4: Simplify right side
    289,421.12x = 59,839,247,446.89
  5. Step 5: Solve for x
    x = 59,839,247,446.89/289,421.12
  6. Step 6: Final answer
    x = 206,754.94

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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.