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Finding the Fourth Proportional to 2,485.88, 3,431.23 and 1,657.88

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Solution

The fourth proportional to 2,485.88, 3,431.23 and 1,657.88 is: 2,288.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,485.88 : 3,431.23 = 1,657.88 : x
  2. Step 2: Convert to fraction form
    2,485.88/3,431.23 = 1,657.88/x
  3. Step 3: Cross multiply
    2,485.88x = 3,431.23 × 1,657.88
  4. Step 4: Simplify right side
    2,485.88x = 5,688,567.59
  5. Step 5: Solve for x
    x = 5,688,567.59/2,485.88
  6. Step 6: Final answer
    x = 2,288.35

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.