Home / 638,623.70-881,306.85-352,153.94

Finding the Fourth Proportional to 638,623.70, 881,306.85 and 352,153.94

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Solution

The fourth proportional to 638,623.70, 881,306.85 and 352,153.94 is: 485,975.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,623.70 : 881,306.85 = 352,153.94 : x
  2. Step 2: Convert to fraction form
    638,623.70/881,306.85 = 352,153.94/x
  3. Step 3: Cross multiply
    638,623.70x = 881,306.85 × 352,153.94
  4. Step 4: Simplify right side
    638,623.70x = 310,355,679,576.49
  5. Step 5: Solve for x
    x = 310,355,679,576.49/638,623.70
  6. Step 6: Final answer
    x = 485,975.83

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Half scale
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Double scale
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Similar ratio
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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.