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Finding the Fourth Proportional to 1,644.21, 2,269.02 and 898.19

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Solution

The fourth proportional to 1,644.21, 2,269.02 and 898.19 is: 1,239.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,644.21 : 2,269.02 = 898.19 : x
  2. Step 2: Convert to fraction form
    1,644.21/2,269.02 = 898.19/x
  3. Step 3: Cross multiply
    1,644.21x = 2,269.02 × 898.19
  4. Step 4: Simplify right side
    1,644.21x = 2,038,011.07
  5. Step 5: Solve for x
    x = 2,038,011.07/1,644.21
  6. Step 6: Final answer
    x = 1,239.51

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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.