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Finding the Fourth Proportional to 1,038.33, 1,554.24 and 776.79

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Solution

The fourth proportional to 1,038.33, 1,554.24 and 776.79 is: 1,162.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,038.33 : 1,554.24 = 776.79 : x
  2. Step 2: Convert to fraction form
    1,038.33/1,554.24 = 776.79/x
  3. Step 3: Cross multiply
    1,038.33x = 1,554.24 × 776.79
  4. Step 4: Simplify right side
    1,038.33x = 1,207,318.09
  5. Step 5: Solve for x
    x = 1,207,318.09/1,038.33
  6. Step 6: Final answer
    x = 1,162.75

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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.