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Finding the Fourth Proportional to 426,544.26, 640,210.02 and 216,329.82

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Solution

The fourth proportional to 426,544.26, 640,210.02 and 216,329.82 is: 324,694.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,544.26 : 640,210.02 = 216,329.82 : x
  2. Step 2: Convert to fraction form
    426,544.26/640,210.02 = 216,329.82/x
  3. Step 3: Cross multiply
    426,544.26x = 640,210.02 × 216,329.82
  4. Step 4: Simplify right side
    426,544.26x = 138,496,518,388.80
  5. Step 5: Solve for x
    x = 138,496,518,388.80/426,544.26
  6. Step 6: Final answer
    x = 324,694.37

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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.