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Finding the Fourth Proportional to 684,642.20, 944,778.44 and 374,539.72

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Solution

The fourth proportional to 684,642.20, 944,778.44 and 374,539.72 is: 516,849.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    684,642.20 : 944,778.44 = 374,539.72 : x
  2. Step 2: Convert to fraction form
    684,642.20/944,778.44 = 374,539.72/x
  3. Step 3: Cross multiply
    684,642.20x = 944,778.44 × 374,539.72
  4. Step 4: Simplify right side
    684,642.20x = 353,857,052,379.64
  5. Step 5: Solve for x
    x = 353,857,052,379.64/684,642.20
  6. Step 6: Final answer
    x = 516,849.61

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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.