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Finding the Fourth Proportional to 848.98, 1,171.05 and 717.82

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Solution

The fourth proportional to 848.98, 1,171.05 and 717.82 is: 990.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    848.98 : 1,171.05 = 717.82 : x
  2. Step 2: Convert to fraction form
    848.98/1,171.05 = 717.82/x
  3. Step 3: Cross multiply
    848.98x = 1,171.05 × 717.82
  4. Step 4: Simplify right side
    848.98x = 840,603.11
  5. Step 5: Solve for x
    x = 840,603.11/848.98
  6. Step 6: Final answer
    x = 990.13

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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.