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Finding the Fourth Proportional to 893.36, 1,340.32 and 830.76

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Solution

The fourth proportional to 893.36, 1,340.32 and 830.76 is: 1,246.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    893.36 : 1,340.32 = 830.76 : x
  2. Step 2: Convert to fraction form
    893.36/1,340.32 = 830.76/x
  3. Step 3: Cross multiply
    893.36x = 1,340.32 × 830.76
  4. Step 4: Simplify right side
    893.36x = 1,113,484.24
  5. Step 5: Solve for x
    x = 1,113,484.24/893.36
  6. Step 6: Final answer
    x = 1,246.40

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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.