Home / 821,110.80-1,231,657.65-260,145.30

Finding the Fourth Proportional to 821,110.80, 1,231,657.65 and 260,145.30

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Solution

The fourth proportional to 821,110.80, 1,231,657.65 and 260,145.30 is: 390,215.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    821,110.80 : 1,231,657.65 = 260,145.30 : x
  2. Step 2: Convert to fraction form
    821,110.80/1,231,657.65 = 260,145.30/x
  3. Step 3: Cross multiply
    821,110.80x = 1,231,657.65 × 260,145.30
  4. Step 4: Simplify right side
    821,110.80x = 320,409,948,856.55
  5. Step 5: Solve for x
    x = 320,409,948,856.55/821,110.80
  6. Step 6: Final answer
    x = 390,215.24

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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.