Home / 312,918.87-431,826.93-169,678.56

Finding the Fourth Proportional to 312,918.87, 431,826.93 and 169,678.56

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Solution

The fourth proportional to 312,918.87, 431,826.93 and 169,678.56 is: 234,155.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,918.87 : 431,826.93 = 169,678.56 : x
  2. Step 2: Convert to fraction form
    312,918.87/431,826.93 = 169,678.56/x
  3. Step 3: Cross multiply
    312,918.87x = 431,826.93 × 169,678.56
  4. Step 4: Simplify right side
    312,918.87x = 73,271,771,651.62
  5. Step 5: Solve for x
    x = 73,271,771,651.62/312,918.87
  6. Step 6: Final answer
    x = 234,155.81

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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.