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Finding the Fourth Proportional to 667,687.99, 921,448.37 and 377,292.16

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Solution

The fourth proportional to 667,687.99, 921,448.37 and 377,292.16 is: 520,685.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    667,687.99 : 921,448.37 = 377,292.16 : x
  2. Step 2: Convert to fraction form
    667,687.99/921,448.37 = 377,292.16/x
  3. Step 3: Cross multiply
    667,687.99x = 921,448.37 × 377,292.16
  4. Step 4: Simplify right side
    667,687.99x = 347,655,245,845.78
  5. Step 5: Solve for x
    x = 347,655,245,845.78/667,687.99
  6. Step 6: Final answer
    x = 520,685.19

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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.