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Finding the Fourth Proportional to 844.87, 1,165.72 and 490.85

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Solution

The fourth proportional to 844.87, 1,165.72 and 490.85 is: 677.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    844.87 : 1,165.72 = 490.85 : x
  2. Step 2: Convert to fraction form
    844.87/1,165.72 = 490.85/x
  3. Step 3: Cross multiply
    844.87x = 1,165.72 × 490.85
  4. Step 4: Simplify right side
    844.87x = 572,185.38
  5. Step 5: Solve for x
    x = 572,185.38/844.87
  6. Step 6: Final answer
    x = 677.25

Related Problems

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Half scale
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Double scale
Find fourth proportional to 845.87, 1,167.09 and 491.85
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.