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Finding the Fourth Proportional to 638,586.40, 957,706.80 and 189,306.40

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Solution

The fourth proportional to 638,586.40, 957,706.80 and 189,306.40 is: 283,908.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,586.40 : 957,706.80 = 189,306.40 : x
  2. Step 2: Convert to fraction form
    638,586.40/957,706.80 = 189,306.40/x
  3. Step 3: Cross multiply
    638,586.40x = 957,706.80 × 189,306.40
  4. Step 4: Simplify right side
    638,586.40x = 181,300,026,563.52
  5. Step 5: Solve for x
    x = 181,300,026,563.52/638,586.40
  6. Step 6: Final answer
    x = 283,908.37

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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.