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Finding the Fourth Proportional to 926.73, 1,390.50 and 378.95

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Solution

The fourth proportional to 926.73, 1,390.50 and 378.95 is: 568.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    926.73 : 1,390.50 = 378.95 : x
  2. Step 2: Convert to fraction form
    926.73/1,390.50 = 378.95/x
  3. Step 3: Cross multiply
    926.73x = 1,390.50 × 378.95
  4. Step 4: Simplify right side
    926.73x = 526,923.02
  5. Step 5: Solve for x
    x = 526,923.02/926.73
  6. Step 6: Final answer
    x = 568.58

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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.