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Finding the Fourth Proportional to 1,025.63, 1,538.70 and 295.21

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Solution

The fourth proportional to 1,025.63, 1,538.70 and 295.21 is: 442.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,025.63 : 1,538.70 = 295.21 : x
  2. Step 2: Convert to fraction form
    1,025.63/1,538.70 = 295.21/x
  3. Step 3: Cross multiply
    1,025.63x = 1,538.70 × 295.21
  4. Step 4: Simplify right side
    1,025.63x = 454,240.44
  5. Step 5: Solve for x
    x = 454,240.44/1,025.63
  6. Step 6: Final answer
    x = 442.89

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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.