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Finding the Fourth Proportional to 262,890.30, 394,594.65 and 129,920.70

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Solution

The fourth proportional to 262,890.30, 394,594.65 and 129,920.70 is: 195,009.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    262,890.30 : 394,594.65 = 129,920.70 : x
  2. Step 2: Convert to fraction form
    262,890.30/394,594.65 = 129,920.70/x
  3. Step 3: Cross multiply
    262,890.30x = 394,594.65 × 129,920.70
  4. Step 4: Simplify right side
    262,890.30x = 51,266,013,144.26
  5. Step 5: Solve for x
    x = 51,266,013,144.26/262,890.30
  6. Step 6: Final answer
    x = 195,009.15

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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.