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Finding the Fourth Proportional to 478,868.70, 718,245.45 and 198,356.70

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Solution

The fourth proportional to 478,868.70, 718,245.45 and 198,356.70 is: 297,511.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,868.70 : 718,245.45 = 198,356.70 : x
  2. Step 2: Convert to fraction form
    478,868.70/718,245.45 = 198,356.70/x
  3. Step 3: Cross multiply
    478,868.70x = 718,245.45 × 198,356.70
  4. Step 4: Simplify right side
    478,868.70x = 142,468,797,252.02
  5. Step 5: Solve for x
    x = 142,468,797,252.02/478,868.70
  6. Step 6: Final answer
    x = 297,511.19

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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.