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Finding the Fourth Proportional to 253,973.40, 380,960.10 and 128,002.20

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Solution

The fourth proportional to 253,973.40, 380,960.10 and 128,002.20 is: 192,003.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    253,973.40 : 380,960.10 = 128,002.20 : x
  2. Step 2: Convert to fraction form
    253,973.40/380,960.10 = 128,002.20/x
  3. Step 3: Cross multiply
    253,973.40x = 380,960.10 × 128,002.20
  4. Step 4: Simplify right side
    253,973.40x = 48,763,730,912.22
  5. Step 5: Solve for x
    x = 48,763,730,912.22/253,973.40
  6. Step 6: Final answer
    x = 192,003.30

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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.