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Finding the Fourth Proportional to 645,255.35, 890,462.67 and 354,879.63

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Solution

The fourth proportional to 645,255.35, 890,462.67 and 354,879.63 is: 489,739.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,255.35 : 890,462.67 = 354,879.63 : x
  2. Step 2: Convert to fraction form
    645,255.35/890,462.67 = 354,879.63/x
  3. Step 3: Cross multiply
    645,255.35x = 890,462.67 × 354,879.63
  4. Step 4: Simplify right side
    645,255.35x = 316,007,061,527.61
  5. Step 5: Solve for x
    x = 316,007,061,527.61/645,255.35
  6. Step 6: Final answer
    x = 489,739.55

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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.