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Finding the Fourth Proportional to 2,927.90, 4,390.50 and 953.22

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Solution

The fourth proportional to 2,927.90, 4,390.50 and 953.22 is: 1,429.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,927.90 : 4,390.50 = 953.22 : x
  2. Step 2: Convert to fraction form
    2,927.90/4,390.50 = 953.22/x
  3. Step 3: Cross multiply
    2,927.90x = 4,390.50 × 953.22
  4. Step 4: Simplify right side
    2,927.90x = 4,185,112.41
  5. Step 5: Solve for x
    x = 4,185,112.41/2,927.90
  6. Step 6: Final answer
    x = 1,429.39

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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.