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Finding the Fourth Proportional to 478,840.20, 718,202.70 and 198,328.20

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Solution

The fourth proportional to 478,840.20, 718,202.70 and 198,328.20 is: 297,468.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,840.20 : 718,202.70 = 198,328.20 : x
  2. Step 2: Convert to fraction form
    478,840.20/718,202.70 = 198,328.20/x
  3. Step 3: Cross multiply
    478,840.20x = 718,202.70 × 198,328.20
  4. Step 4: Simplify right side
    478,840.20x = 142,439,848,726.14
  5. Step 5: Solve for x
    x = 142,439,848,726.14/478,840.20
  6. Step 6: Final answer
    x = 297,468.44

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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.