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Finding the Fourth Proportional to 718,223.94, 991,055.81 and 412,313.68

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Solution

The fourth proportional to 718,223.94, 991,055.81 and 412,313.68 is: 568,939.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    718,223.94 : 991,055.81 = 412,313.68 : x
  2. Step 2: Convert to fraction form
    718,223.94/991,055.81 = 412,313.68/x
  3. Step 3: Cross multiply
    718,223.94x = 991,055.81 × 412,313.68
  4. Step 4: Simplify right side
    718,223.94x = 408,625,868,106.48
  5. Step 5: Solve for x
    x = 408,625,868,106.48/718,223.94
  6. Step 6: Final answer
    x = 568,939.36

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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.