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Finding the Fourth Proportional to 636,986.70, 879,051.42 and 365,078.34

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Solution

The fourth proportional to 636,986.70, 879,051.42 and 365,078.34 is: 503,813.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    636,986.70 : 879,051.42 = 365,078.34 : x
  2. Step 2: Convert to fraction form
    636,986.70/879,051.42 = 365,078.34/x
  3. Step 3: Cross multiply
    636,986.70x = 879,051.42 × 365,078.34
  4. Step 4: Simplify right side
    636,986.70x = 320,922,633,188.24
  5. Step 5: Solve for x
    x = 320,922,633,188.24/636,986.70
  6. Step 6: Final answer
    x = 503,813.71

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1.5x scale

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.