Home / 1,991.30-2,985.98-604.40

Finding the Fourth Proportional to 1,991.30, 2,985.98 and 604.40

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Solution

The fourth proportional to 1,991.30, 2,985.98 and 604.40 is: 906.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,991.30 : 2,985.98 = 604.40 : x
  2. Step 2: Convert to fraction form
    1,991.30/2,985.98 = 604.40/x
  3. Step 3: Cross multiply
    1,991.30x = 2,985.98 × 604.40
  4. Step 4: Simplify right side
    1,991.30x = 1,804,726.31
  5. Step 5: Solve for x
    x = 1,804,726.31/1,991.30
  6. Step 6: Final answer
    x = 906.31

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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.