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Finding the Fourth Proportional to 1,642.48, 2,464.63 and 912.47

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Solution

The fourth proportional to 1,642.48, 2,464.63 and 912.47 is: 1,369.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,642.48 : 2,464.63 = 912.47 : x
  2. Step 2: Convert to fraction form
    1,642.48/2,464.63 = 912.47/x
  3. Step 3: Cross multiply
    1,642.48x = 2,464.63 × 912.47
  4. Step 4: Simplify right side
    1,642.48x = 2,248,886.33
  5. Step 5: Solve for x
    x = 2,248,886.33/1,642.48
  6. Step 6: Final answer
    x = 1,369.20

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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.