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Finding the Fourth Proportional to 312,622.58, 431,418.57 and 169,386.50

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Solution

The fourth proportional to 312,622.58, 431,418.57 and 169,386.50 is: 233,753.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,622.58 : 431,418.57 = 169,386.50 : x
  2. Step 2: Convert to fraction form
    312,622.58/431,418.57 = 169,386.50/x
  3. Step 3: Cross multiply
    312,622.58x = 431,418.57 × 169,386.50
  4. Step 4: Simplify right side
    312,622.58x = 73,076,481,607.31
  5. Step 5: Solve for x
    x = 73,076,481,607.31/312,622.58
  6. Step 6: Final answer
    x = 233,753.05

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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.