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Finding the Fourth Proportional to 880.74, 1,318.77 and 776.94

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Solution

The fourth proportional to 880.74, 1,318.77 and 776.94 is: 1,163.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    880.74 : 1,318.77 = 776.94 : x
  2. Step 2: Convert to fraction form
    880.74/1,318.77 = 776.94/x
  3. Step 3: Cross multiply
    880.74x = 1,318.77 × 776.94
  4. Step 4: Simplify right side
    880.74x = 1,024,605.16
  5. Step 5: Solve for x
    x = 1,024,605.16/880.74
  6. Step 6: Final answer
    x = 1,163.35

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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.