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Finding the Fourth Proportional to 519,781.48, 778,270.40 and 339,420.12

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Solution

The fourth proportional to 519,781.48, 778,270.40 and 339,420.12 is: 508,214.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    519,781.48 : 778,270.40 = 339,420.12 : x
  2. Step 2: Convert to fraction form
    519,781.48/778,270.40 = 339,420.12/x
  3. Step 3: Cross multiply
    519,781.48x = 778,270.40 × 339,420.12
  4. Step 4: Simplify right side
    519,781.48x = 264,160,632,560.45
  5. Step 5: Solve for x
    x = 264,160,632,560.45/519,781.48
  6. Step 6: Final answer
    x = 508,214.78

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1.5x scale

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.