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Finding the Fourth Proportional to 1,427.92, 1,969.95 and 930.38

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Solution

The fourth proportional to 1,427.92, 1,969.95 and 930.38 is: 1,283.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,427.92 : 1,969.95 = 930.38 : x
  2. Step 2: Convert to fraction form
    1,427.92/1,969.95 = 930.38/x
  3. Step 3: Cross multiply
    1,427.92x = 1,969.95 × 930.38
  4. Step 4: Simplify right side
    1,427.92x = 1,832,788.74
  5. Step 5: Solve for x
    x = 1,832,788.74/1,427.92
  6. Step 6: Final answer
    x = 1,283.54

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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.