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Finding the Fourth Proportional to 1,720.89, 2,582.72 and 625.58

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Solution

The fourth proportional to 1,720.89, 2,582.72 and 625.58 is: 938.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,720.89 : 2,582.72 = 625.58 : x
  2. Step 2: Convert to fraction form
    1,720.89/2,582.72 = 625.58/x
  3. Step 3: Cross multiply
    1,720.89x = 2,582.72 × 625.58
  4. Step 4: Simplify right side
    1,720.89x = 1,615,681.94
  5. Step 5: Solve for x
    x = 1,615,681.94/1,720.89
  6. Step 6: Final answer
    x = 938.86

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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.