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Finding the Fourth Proportional to 893.34, 1,231.56 and 718.38

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Solution

The fourth proportional to 893.34, 1,231.56 and 718.38 is: 990.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    893.34 : 1,231.56 = 718.38 : x
  2. Step 2: Convert to fraction form
    893.34/1,231.56 = 718.38/x
  3. Step 3: Cross multiply
    893.34x = 1,231.56 × 718.38
  4. Step 4: Simplify right side
    893.34x = 884,728.07
  5. Step 5: Solve for x
    x = 884,728.07/893.34
  6. Step 6: Final answer
    x = 990.36

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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.