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Finding the Fourth Proportional to 489,811.80, 733,745.70 and 431,362.20

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Solution

The fourth proportional to 489,811.80, 733,745.70 and 431,362.20 is: 646,187.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    489,811.80 : 733,745.70 = 431,362.20 : x
  2. Step 2: Convert to fraction form
    489,811.80/733,745.70 = 431,362.20/x
  3. Step 3: Cross multiply
    489,811.80x = 733,745.70 × 431,362.20
  4. Step 4: Simplify right side
    489,811.80x = 316,510,159,392.54
  5. Step 5: Solve for x
    x = 316,510,159,392.54/489,811.80
  6. Step 6: Final answer
    x = 646,187.29

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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.