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Finding the Fourth Proportional to 343,877.22, 515,465.91 and 318,420.54

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Solution

The fourth proportional to 343,877.22, 515,465.91 and 318,420.54 is: 477,306.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    343,877.22 : 515,465.91 = 318,420.54 : x
  2. Step 2: Convert to fraction form
    343,877.22/515,465.91 = 318,420.54/x
  3. Step 3: Cross multiply
    343,877.22x = 515,465.91 × 318,420.54
  4. Step 4: Simplify right side
    343,877.22x = 164,134,933,413.79
  5. Step 5: Solve for x
    x = 164,134,933,413.79/343,877.22
  6. Step 6: Final answer
    x = 477,306.79

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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.