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Finding the Fourth Proportional to 720,047.88, 993,787.38 and 418,416.84

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Solution

The fourth proportional to 720,047.88, 993,787.38 and 418,416.84 is: 577,485.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    720,047.88 : 993,787.38 = 418,416.84 : x
  2. Step 2: Convert to fraction form
    720,047.88/993,787.38 = 418,416.84/x
  3. Step 3: Cross multiply
    720,047.88x = 993,787.38 × 418,416.84
  4. Step 4: Simplify right side
    720,047.88x = 415,817,375,171.48
  5. Step 5: Solve for x
    x = 415,817,375,171.48/720,047.88
  6. Step 6: Final answer
    x = 577,485.73

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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.