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Finding the Fourth Proportional to 262,278.80, 393,418.20 and 257,904.80

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Solution

The fourth proportional to 262,278.80, 393,418.20 and 257,904.80 is: 386,857.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    262,278.80 : 393,418.20 = 257,904.80 : x
  2. Step 2: Convert to fraction form
    262,278.80/393,418.20 = 257,904.80/x
  3. Step 3: Cross multiply
    262,278.80x = 393,418.20 × 257,904.80
  4. Step 4: Simplify right side
    262,278.80x = 101,464,442,187.36
  5. Step 5: Solve for x
    x = 101,464,442,187.36/262,278.80
  6. Step 6: Final answer
    x = 386,857.20

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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.