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Finding the Fourth Proportional to 1,315.98, 1,973.97 and 494.64

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Solution

The fourth proportional to 1,315.98, 1,973.97 and 494.64 is: 741.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,315.98 : 1,973.97 = 494.64 : x
  2. Step 2: Convert to fraction form
    1,315.98/1,973.97 = 494.64/x
  3. Step 3: Cross multiply
    1,315.98x = 1,973.97 × 494.64
  4. Step 4: Simplify right side
    1,315.98x = 976,404.52
  5. Step 5: Solve for x
    x = 976,404.52/1,315.98
  6. Step 6: Final answer
    x = 741.96

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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.