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Finding the Fourth Proportional to 4,983, 7,478.10 and 1,905

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Solution

The fourth proportional to 4,983, 7,478.10 and 1,905 is: 2,858.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,983 : 7,478.10 = 1,905 : x
  2. Step 2: Convert to fraction form
    4,983/7,478.10 = 1,905/x
  3. Step 3: Cross multiply
    4,983x = 7,478.10 × 1,905
  4. Step 4: Simplify right side
    4,983x = 14,245,780.50
  5. Step 5: Solve for x
    x = 14,245,780.50/4,983
  6. Step 6: Final answer
    x = 2,858.88

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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.