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Finding the Fourth Proportional to 1,718.56, 2,577.84 and 987.67

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Solution

The fourth proportional to 1,718.56, 2,577.84 and 987.67 is: 1,481.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,718.56 : 2,577.84 = 987.67 : x
  2. Step 2: Convert to fraction form
    1,718.56/2,577.84 = 987.67/x
  3. Step 3: Cross multiply
    1,718.56x = 2,577.84 × 987.67
  4. Step 4: Simplify right side
    1,718.56x = 2,546,048.79
  5. Step 5: Solve for x
    x = 2,546,048.79/1,718.56
  6. Step 6: Final answer
    x = 1,481.50

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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.