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Finding the Fourth Proportional to 1,393.99, 1,924.10 and 1,372.93

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Solution

The fourth proportional to 1,393.99, 1,924.10 and 1,372.93 is: 1,895.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,393.99 : 1,924.10 = 1,372.93 : x
  2. Step 2: Convert to fraction form
    1,393.99/1,924.10 = 1,372.93/x
  3. Step 3: Cross multiply
    1,393.99x = 1,924.10 × 1,372.93
  4. Step 4: Simplify right side
    1,393.99x = 2,641,654.61
  5. Step 5: Solve for x
    x = 2,641,654.61/1,393.99
  6. Step 6: Final answer
    x = 1,895.03

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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.