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Finding the Fourth Proportional to 312,687.95, 431,506.44 and 169,449.17

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Solution

The fourth proportional to 312,687.95, 431,506.44 and 169,449.17 is: 233,838.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,687.95 : 431,506.44 = 169,449.17 : x
  2. Step 2: Convert to fraction form
    312,687.95/431,506.44 = 169,449.17/x
  3. Step 3: Cross multiply
    312,687.95x = 431,506.44 × 169,449.17
  4. Step 4: Simplify right side
    312,687.95x = 73,118,405,950.12
  5. Step 5: Solve for x
    x = 73,118,405,950.12/312,687.95
  6. Step 6: Final answer
    x = 233,838.26

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1.5x scale

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.