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Finding the Fourth Proportional to 1,486.62, 2,053.25 and 988.39

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Solution

The fourth proportional to 1,486.62, 2,053.25 and 988.39 is: 1,365.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,486.62 : 2,053.25 = 988.39 : x
  2. Step 2: Convert to fraction form
    1,486.62/2,053.25 = 988.39/x
  3. Step 3: Cross multiply
    1,486.62x = 2,053.25 × 988.39
  4. Step 4: Simplify right side
    1,486.62x = 2,029,419.37
  5. Step 5: Solve for x
    x = 2,029,419.37/1,486.62
  6. Step 6: Final answer
    x = 1,365.13

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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.