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Finding the Fourth Proportional to 881.51, 1,216.47 and 488.51

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Solution

The fourth proportional to 881.51, 1,216.47 and 488.51 is: 674.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    881.51 : 1,216.47 = 488.51 : x
  2. Step 2: Convert to fraction form
    881.51/1,216.47 = 488.51/x
  3. Step 3: Cross multiply
    881.51x = 1,216.47 × 488.51
  4. Step 4: Simplify right side
    881.51x = 594,254.41
  5. Step 5: Solve for x
    x = 594,254.41/881.51
  6. Step 6: Final answer
    x = 674.13

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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.