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Finding the Fourth Proportional to 312,620.58, 431,415.81 and 169,384.50

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Solution

The fourth proportional to 312,620.58, 431,415.81 and 169,384.50 is: 233,750.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,620.58 : 431,415.81 = 169,384.50 : x
  2. Step 2: Convert to fraction form
    312,620.58/431,415.81 = 169,384.50/x
  3. Step 3: Cross multiply
    312,620.58x = 431,415.81 × 169,384.50
  4. Step 4: Simplify right side
    312,620.58x = 73,075,151,268.95
  5. Step 5: Solve for x
    x = 73,075,151,268.95/312,620.58
  6. Step 6: Final answer
    x = 233,750.29

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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.