Home / 426,985.56-640,455.26-216,618.03

Finding the Fourth Proportional to 426,985.56, 640,455.26 and 216,618.03

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Solution

The fourth proportional to 426,985.56, 640,455.26 and 216,618.03 is: 324,915.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,985.56 : 640,455.26 = 216,618.03 : x
  2. Step 2: Convert to fraction form
    426,985.56/640,455.26 = 216,618.03/x
  3. Step 3: Cross multiply
    426,985.56x = 640,455.26 × 216,618.03
  4. Step 4: Simplify right side
    426,985.56x = 138,734,155,641.25
  5. Step 5: Solve for x
    x = 138,734,155,641.25/426,985.56
  6. Step 6: Final answer
    x = 324,915.33

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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.