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Finding the Fourth Proportional to 720,076.91, 993,702.94 and 397,787.15

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Solution

The fourth proportional to 720,076.91, 993,702.94 and 397,787.15 is: 548,944.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    720,076.91 : 993,702.94 = 397,787.15 : x
  2. Step 2: Convert to fraction form
    720,076.91/993,702.94 = 397,787.15/x
  3. Step 3: Cross multiply
    720,076.91x = 993,702.94 × 397,787.15
  4. Step 4: Simplify right side
    720,076.91x = 395,282,261,939.01
  5. Step 5: Solve for x
    x = 395,282,261,939.01/720,076.91
  6. Step 6: Final answer
    x = 548,944.51

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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.