Home / 436,028.80-653,121.60-389,334.40

Finding the Fourth Proportional to 436,028.80, 653,121.60 and 389,334.40

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Solution

The fourth proportional to 436,028.80, 653,121.60 and 389,334.40 is: 583,178.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    436,028.80 : 653,121.60 = 389,334.40 : x
  2. Step 2: Convert to fraction form
    436,028.80/653,121.60 = 389,334.40/x
  3. Step 3: Cross multiply
    436,028.80x = 653,121.60 × 389,334.40
  4. Step 4: Simplify right side
    436,028.80x = 254,282,706,263.04
  5. Step 5: Solve for x
    x = 254,282,706,263.04/436,028.80
  6. Step 6: Final answer
    x = 583,178.69

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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.