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Finding the Fourth Proportional to 478,992.96, 718,638.57 and 142,035.39

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Solution

The fourth proportional to 478,992.96, 718,638.57 and 142,035.39 is: 213,097.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,992.96 : 718,638.57 = 142,035.39 : x
  2. Step 2: Convert to fraction form
    478,992.96/718,638.57 = 142,035.39/x
  3. Step 3: Cross multiply
    478,992.96x = 718,638.57 × 142,035.39
  4. Step 4: Simplify right side
    478,992.96x = 102,072,109,558.99
  5. Step 5: Solve for x
    x = 102,072,109,558.99/478,992.96
  6. Step 6: Final answer
    x = 213,097.31

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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.