Home / 905,569.85-1,358,354.78-485,665.85

Finding the Fourth Proportional to 905,569.85, 1,358,354.78 and 485,665.85

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Solution

The fourth proportional to 905,569.85, 1,358,354.78 and 485,665.85 is: 728,498.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    905,569.85 : 1,358,354.78 = 485,665.85 : x
  2. Step 2: Convert to fraction form
    905,569.85/1,358,354.78 = 485,665.85/x
  3. Step 3: Cross multiply
    905,569.85x = 1,358,354.78 × 485,665.85
  4. Step 4: Simplify right side
    905,569.85x = 659,706,526,401.93
  5. Step 5: Solve for x
    x = 659,706,526,401.93/905,569.85
  6. Step 6: Final answer
    x = 728,498.78

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Double scale
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Similar ratio
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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.