Home / 420,947.84-631,515.72-221,362.40

Finding the Fourth Proportional to 420,947.84, 631,515.72 and 221,362.40

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Solution

The fourth proportional to 420,947.84, 631,515.72 and 221,362.40 is: 332,093.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,947.84 : 631,515.72 = 221,362.40 : x
  2. Step 2: Convert to fraction form
    420,947.84/631,515.72 = 221,362.40/x
  3. Step 3: Cross multiply
    420,947.84x = 631,515.72 × 221,362.40
  4. Step 4: Simplify right side
    420,947.84x = 139,793,835,416.93
  5. Step 5: Solve for x
    x = 139,793,835,416.93/420,947.84
  6. Step 6: Final answer
    x = 332,093.01

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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.