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Finding the Fourth Proportional to 1,247.98, 1,871.73 and 415.05

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Solution

The fourth proportional to 1,247.98, 1,871.73 and 415.05 is: 622.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,247.98 : 1,871.73 = 415.05 : x
  2. Step 2: Convert to fraction form
    1,247.98/1,871.73 = 415.05/x
  3. Step 3: Cross multiply
    1,247.98x = 1,871.73 × 415.05
  4. Step 4: Simplify right side
    1,247.98x = 776,861.54
  5. Step 5: Solve for x
    x = 776,861.54/1,247.98
  6. Step 6: Final answer
    x = 622.50

Related Problems

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Half scale
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Double scale
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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.