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Finding the Fourth Proportional to 519,313.40, 778,893.30 and 145,374.20

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Solution

The fourth proportional to 519,313.40, 778,893.30 and 145,374.20 is: 218,039.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    519,313.40 : 778,893.30 = 145,374.20 : x
  2. Step 2: Convert to fraction form
    519,313.40/778,893.30 = 145,374.20/x
  3. Step 3: Cross multiply
    519,313.40x = 778,893.30 × 145,374.20
  4. Step 4: Simplify right side
    519,313.40x = 113,230,990,372.86
  5. Step 5: Solve for x
    x = 113,230,990,372.86/519,313.40
  6. Step 6: Final answer
    x = 218,039.80

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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.