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Finding the Fourth Proportional to 1,372.50, 2,058.75 and 346.50

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Solution

The fourth proportional to 1,372.50, 2,058.75 and 346.50 is: 519.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,372.50 : 2,058.75 = 346.50 : x
  2. Step 2: Convert to fraction form
    1,372.50/2,058.75 = 346.50/x
  3. Step 3: Cross multiply
    1,372.50x = 2,058.75 × 346.50
  4. Step 4: Simplify right side
    1,372.50x = 713,356.88
  5. Step 5: Solve for x
    x = 713,356.88/1,372.50
  6. Step 6: Final answer
    x = 519.75

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.