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Finding the Fourth Proportional to 638,674.52, 956,927.31 and 385,422.84

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Solution

The fourth proportional to 638,674.52, 956,927.31 and 385,422.84 is: 577,479.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,674.52 : 956,927.31 = 385,422.84 : x
  2. Step 2: Convert to fraction form
    638,674.52/956,927.31 = 385,422.84/x
  3. Step 3: Cross multiply
    638,674.52x = 956,927.31 × 385,422.84
  4. Step 4: Simplify right side
    638,674.52x = 368,821,640,048.43
  5. Step 5: Solve for x
    x = 368,821,640,048.43/638,674.52
  6. Step 6: Final answer
    x = 577,479.81

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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.