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Finding the Fourth Proportional to 817,879.60, 1,226,857.80 and 256,932.40

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Solution

The fourth proportional to 817,879.60, 1,226,857.80 and 256,932.40 is: 385,410.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    817,879.60 : 1,226,857.80 = 256,932.40 : x
  2. Step 2: Convert to fraction form
    817,879.60/1,226,857.80 = 256,932.40/x
  3. Step 3: Cross multiply
    817,879.60x = 1,226,857.80 × 256,932.40
  4. Step 4: Simplify right side
    817,879.60x = 315,219,519,012.72
  5. Step 5: Solve for x
    x = 315,219,519,012.72/817,879.60
  6. Step 6: Final answer
    x = 385,410.66

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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.