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Finding the Fourth Proportional to 1,721.58, 2,375.70 and 975.49

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Solution

The fourth proportional to 1,721.58, 2,375.70 and 975.49 is: 1,346.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,721.58 : 2,375.70 = 975.49 : x
  2. Step 2: Convert to fraction form
    1,721.58/2,375.70 = 975.49/x
  3. Step 3: Cross multiply
    1,721.58x = 2,375.70 × 975.49
  4. Step 4: Simplify right side
    1,721.58x = 2,317,477.53
  5. Step 5: Solve for x
    x = 2,317,477.53/1,721.58
  6. Step 6: Final answer
    x = 1,346.14

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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.