Home / 818,830.80-1,228,246.20-257,792.40

Finding the Fourth Proportional to 818,830.80, 1,228,246.20 and 257,792.40

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Solution

The fourth proportional to 818,830.80, 1,228,246.20 and 257,792.40 is: 386,688.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    818,830.80 : 1,228,246.20 = 257,792.40 : x
  2. Step 2: Convert to fraction form
    818,830.80/1,228,246.20 = 257,792.40/x
  3. Step 3: Cross multiply
    818,830.80x = 1,228,246.20 × 257,792.40
  4. Step 4: Simplify right side
    818,830.80x = 316,632,535,688.88
  5. Step 5: Solve for x
    x = 316,632,535,688.88/818,830.80
  6. Step 6: Final answer
    x = 386,688.60

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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.