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Finding the Fourth Proportional to 1,656.99, 2,485.53 and 561.42

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Solution

The fourth proportional to 1,656.99, 2,485.53 and 561.42 is: 842.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,656.99 : 2,485.53 = 561.42 : x
  2. Step 2: Convert to fraction form
    1,656.99/2,485.53 = 561.42/x
  3. Step 3: Cross multiply
    1,656.99x = 2,485.53 × 561.42
  4. Step 4: Simplify right side
    1,656.99x = 1,395,426.25
  5. Step 5: Solve for x
    x = 1,395,426.25/1,656.99
  6. Step 6: Final answer
    x = 842.15

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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.