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Finding the Fourth Proportional to 287,816.80, 431,336.40 and 192,776.80

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Solution

The fourth proportional to 287,816.80, 431,336.40 and 192,776.80 is: 288,904.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,816.80 : 431,336.40 = 192,776.80 : x
  2. Step 2: Convert to fraction form
    287,816.80/431,336.40 = 192,776.80/x
  3. Step 3: Cross multiply
    287,816.80x = 431,336.40 × 192,776.80
  4. Step 4: Simplify right side
    287,816.80x = 83,151,650,915.52
  5. Step 5: Solve for x
    x = 83,151,650,915.52/287,816.80
  6. Step 6: Final answer
    x = 288,904.79

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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.