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Finding the Fourth Proportional to 5,074.04, 7,001.88 and 2,978

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Solution

The fourth proportional to 5,074.04, 7,001.88 and 2,978 is: 4,109.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,074.04 : 7,001.88 = 2,978 : x
  2. Step 2: Convert to fraction form
    5,074.04/7,001.88 = 2,978/x
  3. Step 3: Cross multiply
    5,074.04x = 7,001.88 × 2,978
  4. Step 4: Simplify right side
    5,074.04x = 20,851,598.64
  5. Step 5: Solve for x
    x = 20,851,598.64/5,074.04
  6. Step 6: Final answer
    x = 4,109.47

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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.