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Finding the Fourth Proportional to 1,705.65, 2,556.63 and 719.01

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Solution

The fourth proportional to 1,705.65, 2,556.63 and 719.01 is: 1,077.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,705.65 : 2,556.63 = 719.01 : x
  2. Step 2: Convert to fraction form
    1,705.65/2,556.63 = 719.01/x
  3. Step 3: Cross multiply
    1,705.65x = 2,556.63 × 719.01
  4. Step 4: Simplify right side
    1,705.65x = 1,838,242.54
  5. Step 5: Solve for x
    x = 1,838,242.54/1,705.65
  6. Step 6: Final answer
    x = 1,077.74

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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.