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Finding the Fourth Proportional to 612,480.15, 918,842.86 and 342,991.53

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Solution

The fourth proportional to 612,480.15, 918,842.86 and 342,991.53 is: 514,555.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    612,480.15 : 918,842.86 = 342,991.53 : x
  2. Step 2: Convert to fraction form
    612,480.15/918,842.86 = 342,991.53/x
  3. Step 3: Cross multiply
    612,480.15x = 918,842.86 × 342,991.53
  4. Step 4: Simplify right side
    612,480.15x = 315,155,318,380.98
  5. Step 5: Solve for x
    x = 315,155,318,380.98/612,480.15
  6. Step 6: Final answer
    x = 514,555.97

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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.