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Finding the Fourth Proportional to 1,719.79, 2,579.02 and 623.89

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Solution

The fourth proportional to 1,719.79, 2,579.02 and 623.89 is: 935.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,719.79 : 2,579.02 = 623.89 : x
  2. Step 2: Convert to fraction form
    1,719.79/2,579.02 = 623.89/x
  3. Step 3: Cross multiply
    1,719.79x = 2,579.02 × 623.89
  4. Step 4: Simplify right side
    1,719.79x = 1,609,024.79
  5. Step 5: Solve for x
    x = 1,609,024.79/1,719.79
  6. Step 6: Final answer
    x = 935.59

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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.