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Finding the Fourth Proportional to 636,989.20, 879,054.87 and 365,080.84

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Solution

The fourth proportional to 636,989.20, 879,054.87 and 365,080.84 is: 503,817.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    636,989.20 : 879,054.87 = 365,080.84 : x
  2. Step 2: Convert to fraction form
    636,989.20/879,054.87 = 365,080.84/x
  3. Step 3: Cross multiply
    636,989.20x = 879,054.87 × 365,080.84
  4. Step 4: Simplify right side
    636,989.20x = 320,926,090,345.69
  5. Step 5: Solve for x
    x = 320,926,090,345.69/636,989.20
  6. Step 6: Final answer
    x = 503,817.16

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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.