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Finding the Fourth Proportional to 2,925.63, 4,389.09 and 845.47

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Solution

The fourth proportional to 2,925.63, 4,389.09 and 845.47 is: 1,268.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,925.63 : 4,389.09 = 845.47 : x
  2. Step 2: Convert to fraction form
    2,925.63/4,389.09 = 845.47/x
  3. Step 3: Cross multiply
    2,925.63x = 4,389.09 × 845.47
  4. Step 4: Simplify right side
    2,925.63x = 3,710,843.92
  5. Step 5: Solve for x
    x = 3,710,843.92/2,925.63
  6. Step 6: Final answer
    x = 1,268.39

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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.