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Finding the Fourth Proportional to 848.74, 1,170.94 and 628.22

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Solution

The fourth proportional to 848.74, 1,170.94 and 628.22 is: 866.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    848.74 : 1,170.94 = 628.22 : x
  2. Step 2: Convert to fraction form
    848.74/1,170.94 = 628.22/x
  3. Step 3: Cross multiply
    848.74x = 1,170.94 × 628.22
  4. Step 4: Simplify right side
    848.74x = 735,607.93
  5. Step 5: Solve for x
    x = 735,607.93/848.74
  6. Step 6: Final answer
    x = 866.71

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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.