Home / 976.04-1,464.41-428.18

Finding the Fourth Proportional to 976.04, 1,464.41 and 428.18

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Solution

The fourth proportional to 976.04, 1,464.41 and 428.18 is: 642.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    976.04 : 1,464.41 = 428.18 : x
  2. Step 2: Convert to fraction form
    976.04/1,464.41 = 428.18/x
  3. Step 3: Cross multiply
    976.04x = 1,464.41 × 428.18
  4. Step 4: Simplify right side
    976.04x = 627,021.61
  5. Step 5: Solve for x
    x = 627,021.61/976.04
  6. Step 6: Final answer
    x = 642.42

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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.