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Finding the Fourth Proportional to 1,642.58, 2,465.10 and 912.38

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Solution

The fourth proportional to 1,642.58, 2,465.10 and 912.38 is: 1,369.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,642.58 : 2,465.10 = 912.38 : x
  2. Step 2: Convert to fraction form
    1,642.58/2,465.10 = 912.38/x
  3. Step 3: Cross multiply
    1,642.58x = 2,465.10 × 912.38
  4. Step 4: Simplify right side
    1,642.58x = 2,249,107.94
  5. Step 5: Solve for x
    x = 2,249,107.94/1,642.58
  6. Step 6: Final answer
    x = 1,369.25

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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.