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Finding the Fourth Proportional to 289,364.40, 433,981.80 and 190,220.40

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Solution

The fourth proportional to 289,364.40, 433,981.80 and 190,220.40 is: 285,288.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,364.40 : 433,981.80 = 190,220.40 : x
  2. Step 2: Convert to fraction form
    289,364.40/433,981.80 = 190,220.40/x
  3. Step 3: Cross multiply
    289,364.40x = 433,981.80 × 190,220.40
  4. Step 4: Simplify right side
    289,364.40x = 82,552,191,588.72
  5. Step 5: Solve for x
    x = 82,552,191,588.72/289,364.40
  6. Step 6: Final answer
    x = 285,288.00

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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.