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Finding the Fourth Proportional to 1,656.98, 2,485.77 and 682.55

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Solution

The fourth proportional to 1,656.98, 2,485.77 and 682.55 is: 1,023.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,656.98 : 2,485.77 = 682.55 : x
  2. Step 2: Convert to fraction form
    1,656.98/2,485.77 = 682.55/x
  3. Step 3: Cross multiply
    1,656.98x = 2,485.77 × 682.55
  4. Step 4: Simplify right side
    1,656.98x = 1,696,646.47
  5. Step 5: Solve for x
    x = 1,696,646.47/1,656.98
  6. Step 6: Final answer
    x = 1,023.94

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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.