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Finding the Fourth Proportional to 1,719.63, 2,580.56 and 623.90

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Solution

The fourth proportional to 1,719.63, 2,580.56 and 623.90 is: 936.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,719.63 : 2,580.56 = 623.90 : x
  2. Step 2: Convert to fraction form
    1,719.63/2,580.56 = 623.90/x
  3. Step 3: Cross multiply
    1,719.63x = 2,580.56 × 623.90
  4. Step 4: Simplify right side
    1,719.63x = 1,610,011.38
  5. Step 5: Solve for x
    x = 1,610,011.38/1,719.63
  6. Step 6: Final answer
    x = 936.25

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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.