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Finding the Fourth Proportional to 1,657.57, 2,485.74 and 487.25

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Solution

The fourth proportional to 1,657.57, 2,485.74 and 487.25 is: 730.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,657.57 : 2,485.74 = 487.25 : x
  2. Step 2: Convert to fraction form
    1,657.57/2,485.74 = 487.25/x
  3. Step 3: Cross multiply
    1,657.57x = 2,485.74 × 487.25
  4. Step 4: Simplify right side
    1,657.57x = 1,211,176.82
  5. Step 5: Solve for x
    x = 1,211,176.82/1,657.57
  6. Step 6: Final answer
    x = 730.69

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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.