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Finding the Fourth Proportional to 478,832.70, 718,191.45 and 198,320.70

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Solution

The fourth proportional to 478,832.70, 718,191.45 and 198,320.70 is: 297,457.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,832.70 : 718,191.45 = 198,320.70 : x
  2. Step 2: Convert to fraction form
    478,832.70/718,191.45 = 198,320.70/x
  3. Step 3: Cross multiply
    478,832.70x = 718,191.45 × 198,320.70
  4. Step 4: Simplify right side
    478,832.70x = 142,432,231,098.02
  5. Step 5: Solve for x
    x = 142,432,231,098.02/478,832.70
  6. Step 6: Final answer
    x = 297,457.19

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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.