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Finding the Fourth Proportional to 1,065, 1,469.76 and 599.40

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Solution

The fourth proportional to 1,065, 1,469.76 and 599.40 is: 827.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,065 : 1,469.76 = 599.40 : x
  2. Step 2: Convert to fraction form
    1,065/1,469.76 = 599.40/x
  3. Step 3: Cross multiply
    1,065x = 1,469.76 × 599.40
  4. Step 4: Simplify right side
    1,065x = 880,974.14
  5. Step 5: Solve for x
    x = 880,974.14/1,065
  6. Step 6: Final answer
    x = 827.21

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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.