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Finding the Fourth Proportional to 1,703.54, 2,348.70 and 1,388.45

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Solution

The fourth proportional to 1,703.54, 2,348.70 and 1,388.45 is: 1,914.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,703.54 : 2,348.70 = 1,388.45 : x
  2. Step 2: Convert to fraction form
    1,703.54/2,348.70 = 1,388.45/x
  3. Step 3: Cross multiply
    1,703.54x = 2,348.70 × 1,388.45
  4. Step 4: Simplify right side
    1,703.54x = 3,261,052.52
  5. Step 5: Solve for x
    x = 3,261,052.52/1,703.54
  6. Step 6: Final answer
    x = 1,914.28

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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.