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Finding the Fourth Proportional to 893.65, 1,233.48 and 628.15

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Solution

The fourth proportional to 893.65, 1,233.48 and 628.15 is: 867.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    893.65 : 1,233.48 = 628.15 : x
  2. Step 2: Convert to fraction form
    893.65/1,233.48 = 628.15/x
  3. Step 3: Cross multiply
    893.65x = 1,233.48 × 628.15
  4. Step 4: Simplify right side
    893.65x = 774,807.38
  5. Step 5: Solve for x
    x = 774,807.38/893.65
  6. Step 6: Final answer
    x = 867.02

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Double 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.