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Finding the Fourth Proportional to 384,353.64, 576,471.30 and 128,190.72

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Solution

The fourth proportional to 384,353.64, 576,471.30 and 128,190.72 is: 192,266.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    384,353.64 : 576,471.30 = 128,190.72 : x
  2. Step 2: Convert to fraction form
    384,353.64/576,471.30 = 128,190.72/x
  3. Step 3: Cross multiply
    384,353.64x = 576,471.30 × 128,190.72
  4. Step 4: Simplify right side
    384,353.64x = 73,898,271,006.34
  5. Step 5: Solve for x
    x = 73,898,271,006.34/384,353.64
  6. Step 6: Final answer
    x = 192,266.35

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.