Home / 1,646.72-2,272.40-938.60

Finding the Fourth Proportional to 1,646.72, 2,272.40 and 938.60

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Solution

The fourth proportional to 1,646.72, 2,272.40 and 938.60 is: 1,295.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,646.72 : 2,272.40 = 938.60 : x
  2. Step 2: Convert to fraction form
    1,646.72/2,272.40 = 938.60/x
  3. Step 3: Cross multiply
    1,646.72x = 2,272.40 × 938.60
  4. Step 4: Simplify right side
    1,646.72x = 2,132,861.60
  5. Step 5: Solve for x
    x = 2,132,861.60/1,646.72
  6. Step 6: Final answer
    x = 1,295.22

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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.