Home / 642,370.50-963,621.36-221,645.16

Finding the Fourth Proportional to 642,370.50, 963,621.36 and 221,645.16

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Solution

The fourth proportional to 642,370.50, 963,621.36 and 221,645.16 is: 332,490.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,370.50 : 963,621.36 = 221,645.16 : x
  2. Step 2: Convert to fraction form
    642,370.50/963,621.36 = 221,645.16/x
  3. Step 3: Cross multiply
    642,370.50x = 963,621.36 × 221,645.16
  4. Step 4: Simplify right side
    642,370.50x = 213,582,010,516.62
  5. Step 5: Solve for x
    x = 213,582,010,516.62/642,370.50
  6. Step 6: Final answer
    x = 332,490.38

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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.