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Finding the Fourth Proportional to 615,578.01, 923,659.44 and 426,329.61

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Solution

The fourth proportional to 615,578.01, 923,659.44 and 426,329.61 is: 639,696.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    615,578.01 : 923,659.44 = 426,329.61 : x
  2. Step 2: Convert to fraction form
    615,578.01/923,659.44 = 426,329.61/x
  3. Step 3: Cross multiply
    615,578.01x = 923,659.44 × 426,329.61
  4. Step 4: Simplify right side
    615,578.01x = 393,783,368,828.02
  5. Step 5: Solve for x
    x = 393,783,368,828.02/615,578.01
  6. Step 6: Final answer
    x = 639,696.94

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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.