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Finding the Fourth Proportional to 1,065, 1,469.78 and 651.08

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Solution

The fourth proportional to 1,065, 1,469.78 and 651.08 is: 898.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,065 : 1,469.78 = 651.08 : x
  2. Step 2: Convert to fraction form
    1,065/1,469.78 = 651.08/x
  3. Step 3: Cross multiply
    1,065x = 1,469.78 × 651.08
  4. Step 4: Simplify right side
    1,065x = 956,944.36
  5. Step 5: Solve for x
    x = 956,944.36/1,065
  6. Step 6: Final answer
    x = 898.54

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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.