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Finding the Fourth Proportional to 478,855.20, 718,225.20 and 198,343.20

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Solution

The fourth proportional to 478,855.20, 718,225.20 and 198,343.20 is: 297,490.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,855.20 : 718,225.20 = 198,343.20 : x
  2. Step 2: Convert to fraction form
    478,855.20/718,225.20 = 198,343.20/x
  3. Step 3: Cross multiply
    478,855.20x = 718,225.20 × 198,343.20
  4. Step 4: Simplify right side
    478,855.20x = 142,455,084,488.64
  5. Step 5: Solve for x
    x = 142,455,084,488.64/478,855.20
  6. Step 6: Final answer
    x = 297,490.94

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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.