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Finding the Fourth Proportional to 262,003.20, 393,296.40 and 143,905.20

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Solution

The fourth proportional to 262,003.20, 393,296.40 and 143,905.20 is: 216,017.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    262,003.20 : 393,296.40 = 143,905.20 : x
  2. Step 2: Convert to fraction form
    262,003.20/393,296.40 = 143,905.20/x
  3. Step 3: Cross multiply
    262,003.20x = 393,296.40 × 143,905.20
  4. Step 4: Simplify right side
    262,003.20x = 56,597,397,101.28
  5. Step 5: Solve for x
    x = 56,597,397,101.28/262,003.20
  6. Step 6: Final answer
    x = 216,017.96

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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.