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Finding the Fourth Proportional to 1,178.44, 1,626.22 and 647.34

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Solution

The fourth proportional to 1,178.44, 1,626.22 and 647.34 is: 893.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,178.44 : 1,626.22 = 647.34 : x
  2. Step 2: Convert to fraction form
    1,178.44/1,626.22 = 647.34/x
  3. Step 3: Cross multiply
    1,178.44x = 1,626.22 × 647.34
  4. Step 4: Simplify right side
    1,178.44x = 1,052,717.25
  5. Step 5: Solve for x
    x = 1,052,717.25/1,178.44
  6. Step 6: Final answer
    x = 893.31

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Half scale
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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.