Home / 420,784.84-631,512.06-221,222.44

Finding the Fourth Proportional to 420,784.84, 631,512.06 and 221,222.44

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Solution

The fourth proportional to 420,784.84, 631,512.06 and 221,222.44 is: 332,009.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,784.84 : 631,512.06 = 221,222.44 : x
  2. Step 2: Convert to fraction form
    420,784.84/631,512.06 = 221,222.44/x
  3. Step 3: Cross multiply
    420,784.84x = 631,512.06 × 221,222.44
  4. Step 4: Simplify right side
    420,784.84x = 139,704,638,802.63
  5. Step 5: Solve for x
    x = 139,704,638,802.63/420,784.84
  6. Step 6: Final answer
    x = 332,009.68

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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.