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Finding the Fourth Proportional to 306,356.69, 422,764.84 and 170,390.23

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Solution

The fourth proportional to 306,356.69, 422,764.84 and 170,390.23 is: 235,134.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    306,356.69 : 422,764.84 = 170,390.23 : x
  2. Step 2: Convert to fraction form
    306,356.69/422,764.84 = 170,390.23/x
  3. Step 3: Cross multiply
    306,356.69x = 422,764.84 × 170,390.23
  4. Step 4: Simplify right side
    306,356.69x = 72,034,998,323.51
  5. Step 5: Solve for x
    x = 72,034,998,323.51/306,356.69
  6. Step 6: Final answer
    x = 235,134.41

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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.