Home / 420,787.84-631,516.56-221,225.44

Finding the Fourth Proportional to 420,787.84, 631,516.56 and 221,225.44

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Solution

The fourth proportional to 420,787.84, 631,516.56 and 221,225.44 is: 332,014.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,787.84 : 631,516.56 = 221,225.44 : x
  2. Step 2: Convert to fraction form
    420,787.84/631,516.56 = 221,225.44/x
  3. Step 3: Cross multiply
    420,787.84x = 631,516.56 × 221,225.44
  4. Step 4: Simplify right side
    420,787.84x = 139,707,528,853.29
  5. Step 5: Solve for x
    x = 139,707,528,853.29/420,787.84
  6. Step 6: Final answer
    x = 332,014.18

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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.