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Finding the Fourth Proportional to 683.63, 1,024.81 and 623.51

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Solution

The fourth proportional to 683.63, 1,024.81 and 623.51 is: 934.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    683.63 : 1,024.81 = 623.51 : x
  2. Step 2: Convert to fraction form
    683.63/1,024.81 = 623.51/x
  3. Step 3: Cross multiply
    683.63x = 1,024.81 × 623.51
  4. Step 4: Simplify right side
    683.63x = 638,979.28
  5. Step 5: Solve for x
    x = 638,979.28/683.63
  6. Step 6: Final answer
    x = 934.69

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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.