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Finding the Fourth Proportional to 262,079.80, 393,119.70 and 257,705.80

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Solution

The fourth proportional to 262,079.80, 393,119.70 and 257,705.80 is: 386,558.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    262,079.80 : 393,119.70 = 257,705.80 : x
  2. Step 2: Convert to fraction form
    262,079.80/393,119.70 = 257,705.80/x
  3. Step 3: Cross multiply
    262,079.80x = 393,119.70 × 257,705.80
  4. Step 4: Simplify right side
    262,079.80x = 101,309,226,784.26
  5. Step 5: Solve for x
    x = 101,309,226,784.26/262,079.80
  6. Step 6: Final answer
    x = 386,558.70

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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.