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Finding the Fourth Proportional to 571,911.39, 789,230.39 and 310,262.85

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Solution

The fourth proportional to 571,911.39, 789,230.39 and 310,262.85 is: 428,158.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    571,911.39 : 789,230.39 = 310,262.85 : x
  2. Step 2: Convert to fraction form
    571,911.39/789,230.39 = 310,262.85/x
  3. Step 3: Cross multiply
    571,911.39x = 789,230.39 × 310,262.85
  4. Step 4: Simplify right side
    571,911.39x = 244,868,868,556.70
  5. Step 5: Solve for x
    x = 244,868,868,556.70/571,911.39
  6. Step 6: Final answer
    x = 428,158.75

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Double scale
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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.