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Finding the Fourth Proportional to 881.72, 1,216.77 and 488.77

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Solution

The fourth proportional to 881.72, 1,216.77 and 488.77 is: 674.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    881.72 : 1,216.77 = 488.77 : x
  2. Step 2: Convert to fraction form
    881.72/1,216.77 = 488.77/x
  3. Step 3: Cross multiply
    881.72x = 1,216.77 × 488.77
  4. Step 4: Simplify right side
    881.72x = 594,718.85
  5. Step 5: Solve for x
    x = 594,718.85/881.72
  6. Step 6: Final answer
    x = 674.50

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1.5x scale

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.