Home / 821,405.10-1,231,992.45-260,496.30

Finding the Fourth Proportional to 821,405.10, 1,231,992.45 and 260,496.30

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Solution

The fourth proportional to 821,405.10, 1,231,992.45 and 260,496.30 is: 390,707.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    821,405.10 : 1,231,992.45 = 260,496.30 : x
  2. Step 2: Convert to fraction form
    821,405.10/1,231,992.45 = 260,496.30/x
  3. Step 3: Cross multiply
    821,405.10x = 1,231,992.45 × 260,496.30
  4. Step 4: Simplify right side
    821,405.10x = 320,929,474,852.94
  5. Step 5: Solve for x
    x = 320,929,474,852.94/821,405.10
  6. Step 6: Final answer
    x = 390,707.92

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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.