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Finding the Fourth Proportional to 638,405.21, 957,889.88 and 334,726.78

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Solution

The fourth proportional to 638,405.21, 957,889.88 and 334,726.78 is: 502,238.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,405.21 : 957,889.88 = 334,726.78 : x
  2. Step 2: Convert to fraction form
    638,405.21/957,889.88 = 334,726.78/x
  3. Step 3: Cross multiply
    638,405.21x = 957,889.88 × 334,726.78
  4. Step 4: Simplify right side
    638,405.21x = 320,631,395,126.99
  5. Step 5: Solve for x
    x = 320,631,395,126.99/638,405.21
  6. Step 6: Final answer
    x = 502,238.06

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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.