Home / 280,511.40-420,516.81-122,614.86

Finding the Fourth Proportional to 280,511.40, 420,516.81 and 122,614.86

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Solution

The fourth proportional to 280,511.40, 420,516.81 and 122,614.86 is: 183,812.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,511.40 : 420,516.81 = 122,614.86 : x
  2. Step 2: Convert to fraction form
    280,511.40/420,516.81 = 122,614.86/x
  3. Step 3: Cross multiply
    280,511.40x = 420,516.81 × 122,614.86
  4. Step 4: Simplify right side
    280,511.40x = 51,561,609,785.80
  5. Step 5: Solve for x
    x = 51,561,609,785.80/280,511.40
  6. Step 6: Final answer
    x = 183,812.89

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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.