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Finding the Fourth Proportional to 636,990.20, 879,056.25 and 365,081.84

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Solution

The fourth proportional to 636,990.20, 879,056.25 and 365,081.84 is: 503,818.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    636,990.20 : 879,056.25 = 365,081.84 : x
  2. Step 2: Convert to fraction form
    636,990.20/879,056.25 = 365,081.84/x
  3. Step 3: Cross multiply
    636,990.20x = 879,056.25 × 365,081.84
  4. Step 4: Simplify right side
    636,990.20x = 320,927,473,213.50
  5. Step 5: Solve for x
    x = 320,927,473,213.50/636,990.20
  6. Step 6: Final answer
    x = 503,818.54

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.