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Finding the Fourth Proportional to 663,283.78, 915,364.06 and 372,986.70

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Solution

The fourth proportional to 663,283.78, 915,364.06 and 372,986.70 is: 514,739.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    663,283.78 : 915,364.06 = 372,986.70 : x
  2. Step 2: Convert to fraction form
    663,283.78/915,364.06 = 372,986.70/x
  3. Step 3: Cross multiply
    663,283.78x = 915,364.06 × 372,986.70
  4. Step 4: Simplify right side
    663,283.78x = 341,418,619,105.54
  5. Step 5: Solve for x
    x = 341,418,619,105.54/663,283.78
  6. Step 6: Final answer
    x = 514,739.89

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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.