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Finding the Fourth Proportional to 1,718.15, 2,576.68 and 485.60

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Solution

The fourth proportional to 1,718.15, 2,576.68 and 485.60 is: 728.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,718.15 : 2,576.68 = 485.60 : x
  2. Step 2: Convert to fraction form
    1,718.15/2,576.68 = 485.60/x
  3. Step 3: Cross multiply
    1,718.15x = 2,576.68 × 485.60
  4. Step 4: Simplify right side
    1,718.15x = 1,251,221.71
  5. Step 5: Solve for x
    x = 1,251,221.71/1,718.15
  6. Step 6: Final answer
    x = 728.24

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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.