Home / 818,813.40-1,228,392.90-257,904.60

Finding the Fourth Proportional to 818,813.40, 1,228,392.90 and 257,904.60

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Solution

The fourth proportional to 818,813.40, 1,228,392.90 and 257,904.60 is: 386,911.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    818,813.40 : 1,228,392.90 = 257,904.60 : x
  2. Step 2: Convert to fraction form
    818,813.40/1,228,392.90 = 257,904.60/x
  3. Step 3: Cross multiply
    818,813.40x = 1,228,392.90 × 257,904.60
  4. Step 4: Simplify right side
    818,813.40x = 316,808,179,517.34
  5. Step 5: Solve for x
    x = 316,808,179,517.34/818,813.40
  6. Step 6: Final answer
    x = 386,911.33

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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.