Home / 1,115.40-1,670.25-626.16

Finding the Fourth Proportional to 1,115.40, 1,670.25 and 626.16

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Solution

The fourth proportional to 1,115.40, 1,670.25 and 626.16 is: 937.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,115.40 : 1,670.25 = 626.16 : x
  2. Step 2: Convert to fraction form
    1,115.40/1,670.25 = 626.16/x
  3. Step 3: Cross multiply
    1,115.40x = 1,670.25 × 626.16
  4. Step 4: Simplify right side
    1,115.40x = 1,045,843.74
  5. Step 5: Solve for x
    x = 1,045,843.74/1,115.40
  6. Step 6: Final answer
    x = 937.64

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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.