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Finding the Fourth Proportional to 660,479.96, 990,407.67 and 255,861.69

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Solution

The fourth proportional to 660,479.96, 990,407.67 and 255,861.69 is: 383,671.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,479.96 : 990,407.67 = 255,861.69 : x
  2. Step 2: Convert to fraction form
    660,479.96/990,407.67 = 255,861.69/x
  3. Step 3: Cross multiply
    660,479.96x = 990,407.67 × 255,861.69
  4. Step 4: Simplify right side
    660,479.96x = 253,407,375,561.65
  5. Step 5: Solve for x
    x = 253,407,375,561.65/660,479.96
  6. Step 6: Final answer
    x = 383,671.56

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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.