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Finding the Fourth Proportional to 2,117.04, 2,921.60 and 1,331.60

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Solution

The fourth proportional to 2,117.04, 2,921.60 and 1,331.60 is: 1,837.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,117.04 : 2,921.60 = 1,331.60 : x
  2. Step 2: Convert to fraction form
    2,117.04/2,921.60 = 1,331.60/x
  3. Step 3: Cross multiply
    2,117.04x = 2,921.60 × 1,331.60
  4. Step 4: Simplify right side
    2,117.04x = 3,890,402.56
  5. Step 5: Solve for x
    x = 3,890,402.56/2,117.04
  6. Step 6: Final answer
    x = 1,837.66

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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.