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Finding the Fourth Proportional to 1,916.07, 2,874 and 617.45

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Solution

The fourth proportional to 1,916.07, 2,874 and 617.45 is: 926.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,916.07 : 2,874 = 617.45 : x
  2. Step 2: Convert to fraction form
    1,916.07/2,874 = 617.45/x
  3. Step 3: Cross multiply
    1,916.07x = 2,874 × 617.45
  4. Step 4: Simplify right side
    1,916.07x = 1,774,536.93
  5. Step 5: Solve for x
    x = 1,774,536.93/1,916.07
  6. Step 6: Final answer
    x = 926.13

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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.