Home / 388,834.36-536,591.44-209,986.36

Finding the Fourth Proportional to 388,834.36, 536,591.44 and 209,986.36

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Solution

The fourth proportional to 388,834.36, 536,591.44 and 209,986.36 is: 289,781.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,834.36 : 536,591.44 = 209,986.36 : x
  2. Step 2: Convert to fraction form
    388,834.36/536,591.44 = 209,986.36/x
  3. Step 3: Cross multiply
    388,834.36x = 536,591.44 × 209,986.36
  4. Step 4: Simplify right side
    388,834.36x = 112,676,883,292.76
  5. Step 5: Solve for x
    x = 112,676,883,292.76/388,834.36
  6. Step 6: Final answer
    x = 289,781.19

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.