Home / 820,623.46-1,231,473.42-288,130.78

Finding the Fourth Proportional to 820,623.46, 1,231,473.42 and 288,130.78

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Solution

The fourth proportional to 820,623.46, 1,231,473.42 and 288,130.78 is: 432,385.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    820,623.46 : 1,231,473.42 = 288,130.78 : x
  2. Step 2: Convert to fraction form
    820,623.46/1,231,473.42 = 288,130.78/x
  3. Step 3: Cross multiply
    820,623.46x = 1,231,473.42 × 288,130.78
  4. Step 4: Simplify right side
    820,623.46x = 354,825,397,053.87
  5. Step 5: Solve for x
    x = 354,825,397,053.87/820,623.46
  6. Step 6: Final answer
    x = 432,385.15

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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.