Home / 426,945.81-640,395.63-216,578.28

Finding the Fourth Proportional to 426,945.81, 640,395.63 and 216,578.28

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Solution

The fourth proportional to 426,945.81, 640,395.63 and 216,578.28 is: 324,855.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,945.81 : 640,395.63 = 216,578.28 : x
  2. Step 2: Convert to fraction form
    426,945.81/640,395.63 = 216,578.28/x
  3. Step 3: Cross multiply
    426,945.81x = 640,395.63 × 216,578.28
  4. Step 4: Simplify right side
    426,945.81x = 138,695,784,064.92
  5. Step 5: Solve for x
    x = 138,695,784,064.92/426,945.81
  6. Step 6: Final answer
    x = 324,855.71

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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.