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Finding the Fourth Proportional to 478,929.60, 718,135.20 and 198,475.20

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Solution

The fourth proportional to 478,929.60, 718,135.20 and 198,475.20 is: 297,605.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,929.60 : 718,135.20 = 198,475.20 : x
  2. Step 2: Convert to fraction form
    478,929.60/718,135.20 = 198,475.20/x
  3. Step 3: Cross multiply
    478,929.60x = 718,135.20 × 198,475.20
  4. Step 4: Simplify right side
    478,929.60x = 142,532,027,447.04
  5. Step 5: Solve for x
    x = 142,532,027,447.04/478,929.60
  6. Step 6: Final answer
    x = 297,605.38

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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.