Home / 642,237.80-963,644.70-221,815.40

Finding the Fourth Proportional to 642,237.80, 963,644.70 and 221,815.40

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Solution

The fourth proportional to 642,237.80, 963,644.70 and 221,815.40 is: 332,822.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,237.80 : 963,644.70 = 221,815.40 : x
  2. Step 2: Convert to fraction form
    642,237.80/963,644.70 = 221,815.40/x
  3. Step 3: Cross multiply
    642,237.80x = 963,644.70 × 221,815.40
  4. Step 4: Simplify right side
    642,237.80x = 213,751,234,588.38
  5. Step 5: Solve for x
    x = 213,751,234,588.38/642,237.80
  6. Step 6: Final answer
    x = 332,822.57

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1.5x scale

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.