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Finding the Fourth Proportional to 389,091.70, 536,935.62 and 217,014.88

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Solution

The fourth proportional to 389,091.70, 536,935.62 and 217,014.88 is: 299,474.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,091.70 : 536,935.62 = 217,014.88 : x
  2. Step 2: Convert to fraction form
    389,091.70/536,935.62 = 217,014.88/x
  3. Step 3: Cross multiply
    389,091.70x = 536,935.62 × 217,014.88
  4. Step 4: Simplify right side
    389,091.70x = 116,523,019,142.03
  5. Step 5: Solve for x
    x = 116,523,019,142.03/389,091.70
  6. Step 6: Final answer
    x = 299,474.44

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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.