Home / 398,834.76-550,595.09-307,986.78

Finding the Fourth Proportional to 398,834.76, 550,595.09 and 307,986.78

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Solution

The fourth proportional to 398,834.76, 550,595.09 and 307,986.78 is: 425,178.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,834.76 : 550,595.09 = 307,986.78 : x
  2. Step 2: Convert to fraction form
    398,834.76/550,595.09 = 307,986.78/x
  3. Step 3: Cross multiply
    398,834.76x = 550,595.09 × 307,986.78
  4. Step 4: Simplify right side
    398,834.76x = 169,576,009,622.88
  5. Step 5: Solve for x
    x = 169,576,009,622.88/398,834.76
  6. Step 6: Final answer
    x = 425,178.61

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.