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Finding the Fourth Proportional to 893.36, 1,340.10 and 345.36

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Solution

The fourth proportional to 893.36, 1,340.10 and 345.36 is: 518.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    893.36 : 1,340.10 = 345.36 : x
  2. Step 2: Convert to fraction form
    893.36/1,340.10 = 345.36/x
  3. Step 3: Cross multiply
    893.36x = 1,340.10 × 345.36
  4. Step 4: Simplify right side
    893.36x = 462,816.94
  5. Step 5: Solve for x
    x = 462,816.94/893.36
  6. Step 6: Final answer
    x = 518.06

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Double scale
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Similar ratio
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1.5x scale

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.