Home / 426,946.31-640,396.38-216,578.78

Finding the Fourth Proportional to 426,946.31, 640,396.38 and 216,578.78

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Solution

The fourth proportional to 426,946.31, 640,396.38 and 216,578.78 is: 324,856.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,946.31 : 640,396.38 = 216,578.78 : x
  2. Step 2: Convert to fraction form
    426,946.31/640,396.38 = 216,578.78/x
  3. Step 3: Cross multiply
    426,946.31x = 640,396.38 × 216,578.78
  4. Step 4: Simplify right side
    426,946.31x = 138,696,266,696.82
  5. Step 5: Solve for x
    x = 138,696,266,696.82/426,946.31
  6. Step 6: Final answer
    x = 324,856.46

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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.