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Finding the Fourth Proportional to 289,847.48, 399,993.45 and 217,121.52

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Solution

The fourth proportional to 289,847.48, 399,993.45 and 217,121.52 is: 299,630.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,847.48 : 399,993.45 = 217,121.52 : x
  2. Step 2: Convert to fraction form
    289,847.48/399,993.45 = 217,121.52/x
  3. Step 3: Cross multiply
    289,847.48x = 399,993.45 × 217,121.52
  4. Step 4: Simplify right side
    289,847.48x = 86,847,185,854.04
  5. Step 5: Solve for x
    x = 86,847,185,854.04/289,847.48
  6. Step 6: Final answer
    x = 299,630.64

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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.