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Finding the Fourth Proportional to 398,612.20, 596,190.30 and 356,794.60

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Solution

The fourth proportional to 398,612.20, 596,190.30 and 356,794.60 is: 533,645.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,612.20 : 596,190.30 = 356,794.60 : x
  2. Step 2: Convert to fraction form
    398,612.20/596,190.30 = 356,794.60/x
  3. Step 3: Cross multiply
    398,612.20x = 596,190.30 × 356,794.60
  4. Step 4: Simplify right side
    398,612.20x = 212,717,479,612.38
  5. Step 5: Solve for x
    x = 212,717,479,612.38/398,612.20
  6. Step 6: Final answer
    x = 533,645.18

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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.