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Finding the Fourth Proportional to 2,459.79, 3,689.70 and 998.60

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Solution

The fourth proportional to 2,459.79, 3,689.70 and 998.60 is: 1,497.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,459.79 : 3,689.70 = 998.60 : x
  2. Step 2: Convert to fraction form
    2,459.79/3,689.70 = 998.60/x
  3. Step 3: Cross multiply
    2,459.79x = 3,689.70 × 998.60
  4. Step 4: Simplify right side
    2,459.79x = 3,684,534.42
  5. Step 5: Solve for x
    x = 3,684,534.42/2,459.79
  6. Step 6: Final answer
    x = 1,497.91

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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.