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Finding the Fourth Proportional to 460,879.36, 691,440 and 145,346.56

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Solution

The fourth proportional to 460,879.36, 691,440 and 145,346.56 is: 218,057.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    460,879.36 : 691,440 = 145,346.56 : x
  2. Step 2: Convert to fraction form
    460,879.36/691,440 = 145,346.56/x
  3. Step 3: Cross multiply
    460,879.36x = 691,440 × 145,346.56
  4. Step 4: Simplify right side
    460,879.36x = 100,498,425,446.40
  5. Step 5: Solve for x
    x = 100,498,425,446.40/460,879.36
  6. Step 6: Final answer
    x = 218,057.99

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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.