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Finding the Fourth Proportional to 306,851.90, 423,621.29 and 215,251.83

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Solution

The fourth proportional to 306,851.90, 423,621.29 and 215,251.83 is: 297,163.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    306,851.90 : 423,621.29 = 215,251.83 : x
  2. Step 2: Convert to fraction form
    306,851.90/423,621.29 = 215,251.83/x
  3. Step 3: Cross multiply
    306,851.90x = 423,621.29 × 215,251.83
  4. Step 4: Simplify right side
    306,851.90x = 91,185,258,437.59
  5. Step 5: Solve for x
    x = 91,185,258,437.59/306,851.90
  6. Step 6: Final answer
    x = 297,163.75

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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.