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Finding the Fourth Proportional to 5,292.36, 7,938.54 and 2,979

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Solution

The fourth proportional to 5,292.36, 7,938.54 and 2,979 is: 4,468.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,292.36 : 7,938.54 = 2,979 : x
  2. Step 2: Convert to fraction form
    5,292.36/7,938.54 = 2,979/x
  3. Step 3: Cross multiply
    5,292.36x = 7,938.54 × 2,979
  4. Step 4: Simplify right side
    5,292.36x = 23,648,910.66
  5. Step 5: Solve for x
    x = 23,648,910.66/5,292.36
  6. Step 6: Final answer
    x = 4,468.50

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1.5x scale

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.