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Finding the Fourth Proportional to 1,804.31, 2,489.95 and 976.31

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Solution

The fourth proportional to 1,804.31, 2,489.95 and 976.31 is: 1,347.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,804.31 : 2,489.95 = 976.31 : x
  2. Step 2: Convert to fraction form
    1,804.31/2,489.95 = 976.31/x
  3. Step 3: Cross multiply
    1,804.31x = 2,489.95 × 976.31
  4. Step 4: Simplify right side
    1,804.31x = 2,430,970.53
  5. Step 5: Solve for x
    x = 2,430,970.53/1,804.31
  6. Step 6: Final answer
    x = 1,347.31

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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.