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Finding the Fourth Proportional to 478,912, 718,371.60 and 212,600.92

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Solution

The fourth proportional to 478,912, 718,371.60 and 212,600.92 is: 318,902.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,912 : 718,371.60 = 212,600.92 : x
  2. Step 2: Convert to fraction form
    478,912/718,371.60 = 212,600.92/x
  3. Step 3: Cross multiply
    478,912x = 718,371.60 × 212,600.92
  4. Step 4: Simplify right side
    478,912x = 152,726,463,061.87
  5. Step 5: Solve for x
    x = 152,726,463,061.87/478,912
  6. Step 6: Final answer
    x = 318,902.98

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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.