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Finding the Fourth Proportional to 312,479.19, 431,219.10 and 169,235.94

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Solution

The fourth proportional to 312,479.19, 431,219.10 and 169,235.94 is: 233,544.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,479.19 : 431,219.10 = 169,235.94 : x
  2. Step 2: Convert to fraction form
    312,479.19/431,219.10 = 169,235.94/x
  3. Step 3: Cross multiply
    312,479.19x = 431,219.10 × 169,235.94
  4. Step 4: Simplify right side
    312,479.19x = 72,977,769,734.45
  5. Step 5: Solve for x
    x = 72,977,769,734.45/312,479.19
  6. Step 6: Final answer
    x = 233,544.42

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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.