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Finding the Fourth Proportional to 4,987.78, 7,483.94 and 1,868.03

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Solution

The fourth proportional to 4,987.78, 7,483.94 and 1,868.03 is: 2,802.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,987.78 : 7,483.94 = 1,868.03 : x
  2. Step 2: Convert to fraction form
    4,987.78/7,483.94 = 1,868.03/x
  3. Step 3: Cross multiply
    4,987.78x = 7,483.94 × 1,868.03
  4. Step 4: Simplify right side
    4,987.78x = 13,980,201.04
  5. Step 5: Solve for x
    x = 13,980,201.04/4,987.78
  6. Step 6: Final answer
    x = 2,802.89

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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.