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Finding the Fourth Proportional to 370,664.43, 511,542.91 and 209,520.80

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Solution

The fourth proportional to 370,664.43, 511,542.91 and 209,520.80 is: 289,153.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    370,664.43 : 511,542.91 = 209,520.80 : x
  2. Step 2: Convert to fraction form
    370,664.43/511,542.91 = 209,520.80/x
  3. Step 3: Cross multiply
    370,664.43x = 511,542.91 × 209,520.80
  4. Step 4: Simplify right side
    370,664.43x = 107,178,879,737.53
  5. Step 5: Solve for x
    x = 107,178,879,737.53/370,664.43
  6. Step 6: Final answer
    x = 289,153.40

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.