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Finding the Fourth Proportional to 848.84, 1,171.50 and 553.88

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Solution

The fourth proportional to 848.84, 1,171.50 and 553.88 is: 764.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    848.84 : 1,171.50 = 553.88 : x
  2. Step 2: Convert to fraction form
    848.84/1,171.50 = 553.88/x
  3. Step 3: Cross multiply
    848.84x = 1,171.50 × 553.88
  4. Step 4: Simplify right side
    848.84x = 648,870.42
  5. Step 5: Solve for x
    x = 648,870.42/848.84
  6. Step 6: Final answer
    x = 764.42

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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.