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Finding the Fourth Proportional to 893.42, 1,340.31 and 345.62

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Solution

The fourth proportional to 893.42, 1,340.31 and 345.62 is: 518.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    893.42 : 1,340.31 = 345.62 : x
  2. Step 2: Convert to fraction form
    893.42/1,340.31 = 345.62/x
  3. Step 3: Cross multiply
    893.42x = 1,340.31 × 345.62
  4. Step 4: Simplify right side
    893.42x = 463,237.94
  5. Step 5: Solve for x
    x = 463,237.94/893.42
  6. Step 6: Final answer
    x = 518.50

Related Problems

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Half scale
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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.