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Finding the Fourth Proportional to 684,876.32, 945,078 and 383,012

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Solution

The fourth proportional to 684,876.32, 945,078 and 383,012 is: 528,527.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    684,876.32 : 945,078 = 383,012 : x
  2. Step 2: Convert to fraction form
    684,876.32/945,078 = 383,012/x
  3. Step 3: Cross multiply
    684,876.32x = 945,078 × 383,012
  4. Step 4: Simplify right side
    684,876.32x = 361,976,214,936
  5. Step 5: Solve for x
    x = 361,976,214,936/684,876.32
  6. Step 6: Final answer
    x = 528,527.86

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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.