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Finding the Fourth Proportional to 519,780.48, 778,268.90 and 339,419.12

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Solution

The fourth proportional to 519,780.48, 778,268.90 and 339,419.12 is: 508,213.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    519,780.48 : 778,268.90 = 339,419.12 : x
  2. Step 2: Convert to fraction form
    519,780.48/778,268.90 = 339,419.12/x
  3. Step 3: Cross multiply
    519,780.48x = 778,268.90 × 339,419.12
  4. Step 4: Simplify right side
    519,780.48x = 264,159,345,161.37
  5. Step 5: Solve for x
    x = 264,159,345,161.37/519,780.48
  6. Step 6: Final answer
    x = 508,213.28

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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.