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Finding the Fourth Proportional to 2,154.74, 2,973.81 and 1,315.26

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Solution

The fourth proportional to 2,154.74, 2,973.81 and 1,315.26 is: 1,815.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,154.74 : 2,973.81 = 1,315.26 : x
  2. Step 2: Convert to fraction form
    2,154.74/2,973.81 = 1,315.26/x
  3. Step 3: Cross multiply
    2,154.74x = 2,973.81 × 1,315.26
  4. Step 4: Simplify right side
    2,154.74x = 3,911,326.76
  5. Step 5: Solve for x
    x = 3,911,326.76/2,154.74
  6. Step 6: Final answer
    x = 1,815.22

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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.