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Finding the Fourth Proportional to 3,617.76, 5,428.08 and 1,670.88

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Solution

The fourth proportional to 3,617.76, 5,428.08 and 1,670.88 is: 2,506.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,617.76 : 5,428.08 = 1,670.88 : x
  2. Step 2: Convert to fraction form
    3,617.76/5,428.08 = 1,670.88/x
  3. Step 3: Cross multiply
    3,617.76x = 5,428.08 × 1,670.88
  4. Step 4: Simplify right side
    3,617.76x = 9,069,670.31
  5. Step 5: Solve for x
    x = 9,069,670.31/3,617.76
  6. Step 6: Final answer
    x = 2,506.99

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1.5x scale

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.