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Finding the Fourth Proportional to 478,876, 718,317.60 and 212,564.92

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Solution

The fourth proportional to 478,876, 718,317.60 and 212,564.92 is: 318,848.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,876 : 718,317.60 = 212,564.92 : x
  2. Step 2: Convert to fraction form
    478,876/718,317.60 = 212,564.92/x
  3. Step 3: Cross multiply
    478,876x = 718,317.60 × 212,564.92
  4. Step 4: Simplify right side
    478,876x = 152,689,123,178.59
  5. Step 5: Solve for x
    x = 152,689,123,178.59/478,876
  6. Step 6: Final answer
    x = 318,848.98

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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.