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Finding the Fourth Proportional to 977.84, 1,467.96 and 671.66

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Solution

The fourth proportional to 977.84, 1,467.96 and 671.66 is: 1,008.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    977.84 : 1,467.96 = 671.66 : x
  2. Step 2: Convert to fraction form
    977.84/1,467.96 = 671.66/x
  3. Step 3: Cross multiply
    977.84x = 1,467.96 × 671.66
  4. Step 4: Simplify right side
    977.84x = 985,970.01
  5. Step 5: Solve for x
    x = 985,970.01/977.84
  6. Step 6: Final answer
    x = 1,008.31

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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.