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Finding the Fourth Proportional to 306,302.90, 422,665.65 and 170,314.91

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Solution

The fourth proportional to 306,302.90, 422,665.65 and 170,314.91 is: 235,016.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    306,302.90 : 422,665.65 = 170,314.91 : x
  2. Step 2: Convert to fraction form
    306,302.90/422,665.65 = 170,314.91/x
  3. Step 3: Cross multiply
    306,302.90x = 422,665.65 × 170,314.91
  4. Step 4: Simplify right side
    306,302.90x = 71,986,262,139.84
  5. Step 5: Solve for x
    x = 71,986,262,139.84/306,302.90
  6. Step 6: Final answer
    x = 235,016.59

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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.