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Finding the Fourth Proportional to 553,376.68, 828,734.34 and 315,999.88

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Solution

The fourth proportional to 553,376.68, 828,734.34 and 315,999.88 is: 473,239.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    553,376.68 : 828,734.34 = 315,999.88 : x
  2. Step 2: Convert to fraction form
    553,376.68/828,734.34 = 315,999.88/x
  3. Step 3: Cross multiply
    553,376.68x = 828,734.34 × 315,999.88
  4. Step 4: Simplify right side
    553,376.68x = 261,879,951,991.88
  5. Step 5: Solve for x
    x = 261,879,951,991.88/553,376.68
  6. Step 6: Final answer
    x = 473,239.95

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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.