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Finding the Fourth Proportional to 1,427.48, 1,970.49 and 930.54

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Solution

The fourth proportional to 1,427.48, 1,970.49 and 930.54 is: 1,284.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,427.48 : 1,970.49 = 930.54 : x
  2. Step 2: Convert to fraction form
    1,427.48/1,970.49 = 930.54/x
  3. Step 3: Cross multiply
    1,427.48x = 1,970.49 × 930.54
  4. Step 4: Simplify right side
    1,427.48x = 1,833,619.76
  5. Step 5: Solve for x
    x = 1,833,619.76/1,427.48
  6. Step 6: Final answer
    x = 1,284.52

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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.