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Finding the Fourth Proportional to 661,991.28, 913,643.43 and 367,708.13

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Solution

The fourth proportional to 661,991.28, 913,643.43 and 367,708.13 is: 507,490.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    661,991.28 : 913,643.43 = 367,708.13 : x
  2. Step 2: Convert to fraction form
    661,991.28/913,643.43 = 367,708.13/x
  3. Step 3: Cross multiply
    661,991.28x = 913,643.43 × 367,708.13
  4. Step 4: Simplify right side
    661,991.28x = 335,954,112,563.87
  5. Step 5: Solve for x
    x = 335,954,112,563.87/661,991.28
  6. Step 6: Final answer
    x = 507,490.24

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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.