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Finding the Fourth Proportional to 262,009.20, 393,305.40 and 143,911.20

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Solution

The fourth proportional to 262,009.20, 393,305.40 and 143,911.20 is: 216,026.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    262,009.20 : 393,305.40 = 143,911.20 : x
  2. Step 2: Convert to fraction form
    262,009.20/393,305.40 = 143,911.20/x
  3. Step 3: Cross multiply
    262,009.20x = 393,305.40 × 143,911.20
  4. Step 4: Simplify right side
    262,009.20x = 56,601,052,080.48
  5. Step 5: Solve for x
    x = 56,601,052,080.48/262,009.20
  6. Step 6: Final answer
    x = 216,026.96

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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.