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Finding the Fourth Proportional to 825.95, 1,139.92 and 471.98

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Solution

The fourth proportional to 825.95, 1,139.92 and 471.98 is: 651.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    825.95 : 1,139.92 = 471.98 : x
  2. Step 2: Convert to fraction form
    825.95/1,139.92 = 471.98/x
  3. Step 3: Cross multiply
    825.95x = 1,139.92 × 471.98
  4. Step 4: Simplify right side
    825.95x = 538,017.35
  5. Step 5: Solve for x
    x = 538,017.35/825.95
  6. Step 6: Final answer
    x = 651.39

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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.