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Finding the Fourth Proportional to 1,657.30, 2,485.56 and 561.64

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Solution

The fourth proportional to 1,657.30, 2,485.56 and 561.64 is: 842.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,657.30 : 2,485.56 = 561.64 : x
  2. Step 2: Convert to fraction form
    1,657.30/2,485.56 = 561.64/x
  3. Step 3: Cross multiply
    1,657.30x = 2,485.56 × 561.64
  4. Step 4: Simplify right side
    1,657.30x = 1,395,989.92
  5. Step 5: Solve for x
    x = 1,395,989.92/1,657.30
  6. Step 6: Final answer
    x = 842.33

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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.