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Finding the Fourth Proportional to 390,633.70, 584,346.38 and 311,901.70

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Solution

The fourth proportional to 390,633.70, 584,346.38 and 311,901.70 is: 466,571.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,633.70 : 584,346.38 = 311,901.70 : x
  2. Step 2: Convert to fraction form
    390,633.70/584,346.38 = 311,901.70/x
  3. Step 3: Cross multiply
    390,633.70x = 584,346.38 × 311,901.70
  4. Step 4: Simplify right side
    390,633.70x = 182,258,629,310.85
  5. Step 5: Solve for x
    x = 182,258,629,310.85/390,633.70
  6. Step 6: Final answer
    x = 466,571.70

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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.