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Finding the Fourth Proportional to 519,327.60, 778,933.80 and 145,388.40

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Solution

The fourth proportional to 519,327.60, 778,933.80 and 145,388.40 is: 218,066.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    519,327.60 : 778,933.80 = 145,388.40 : x
  2. Step 2: Convert to fraction form
    519,327.60/778,933.80 = 145,388.40/x
  3. Step 3: Cross multiply
    519,327.60x = 778,933.80 × 145,388.40
  4. Step 4: Simplify right side
    519,327.60x = 113,247,938,887.92
  5. Step 5: Solve for x
    x = 113,247,938,887.92/519,327.60
  6. Step 6: Final answer
    x = 218,066.47

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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.