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Finding the Fourth Proportional to 1,025.04, 1,415.16 and 676.56

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Solution

The fourth proportional to 1,025.04, 1,415.16 and 676.56 is: 934.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,025.04 : 1,415.16 = 676.56 : x
  2. Step 2: Convert to fraction form
    1,025.04/1,415.16 = 676.56/x
  3. Step 3: Cross multiply
    1,025.04x = 1,415.16 × 676.56
  4. Step 4: Simplify right side
    1,025.04x = 957,440.65
  5. Step 5: Solve for x
    x = 957,440.65/1,025.04
  6. Step 6: Final answer
    x = 934.05

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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.