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Finding the Fourth Proportional to 5,290.88, 7,889.74 and 4,921.52

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Solution

The fourth proportional to 5,290.88, 7,889.74 and 4,921.52 is: 7,338.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,290.88 : 7,889.74 = 4,921.52 : x
  2. Step 2: Convert to fraction form
    5,290.88/7,889.74 = 4,921.52/x
  3. Step 3: Cross multiply
    5,290.88x = 7,889.74 × 4,921.52
  4. Step 4: Simplify right side
    5,290.88x = 38,829,513.20
  5. Step 5: Solve for x
    x = 38,829,513.20/5,290.88
  6. Step 6: Final answer
    x = 7,338.95

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These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.