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Finding the Fourth Proportional to 368,996.40, 553,494.60 and 211,240.80

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Solution

The fourth proportional to 368,996.40, 553,494.60 and 211,240.80 is: 316,861.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    368,996.40 : 553,494.60 = 211,240.80 : x
  2. Step 2: Convert to fraction form
    368,996.40/553,494.60 = 211,240.80/x
  3. Step 3: Cross multiply
    368,996.40x = 553,494.60 × 211,240.80
  4. Step 4: Simplify right side
    368,996.40x = 116,920,642,099.68
  5. Step 5: Solve for x
    x = 116,920,642,099.68/368,996.40
  6. Step 6: Final answer
    x = 316,861.20

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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.