Home / 821,434.40-1,232,195.64-260,512.64

Finding the Fourth Proportional to 821,434.40, 1,232,195.64 and 260,512.64

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Solution

The fourth proportional to 821,434.40, 1,232,195.64 and 260,512.64 is: 390,782.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    821,434.40 : 1,232,195.64 = 260,512.64 : x
  2. Step 2: Convert to fraction form
    821,434.40/1,232,195.64 = 260,512.64/x
  3. Step 3: Cross multiply
    821,434.40x = 1,232,195.64 × 260,512.64
  4. Step 4: Simplify right side
    821,434.40x = 321,002,539,172.89
  5. Step 5: Solve for x
    x = 321,002,539,172.89/821,434.40
  6. Step 6: Final answer
    x = 390,782.93

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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.