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Finding the Fourth Proportional to 1,603.80, 2,405.70 and 1,534.10

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Solution

The fourth proportional to 1,603.80, 2,405.70 and 1,534.10 is: 2,301.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,603.80 : 2,405.70 = 1,534.10 : x
  2. Step 2: Convert to fraction form
    1,603.80/2,405.70 = 1,534.10/x
  3. Step 3: Cross multiply
    1,603.80x = 2,405.70 × 1,534.10
  4. Step 4: Simplify right side
    1,603.80x = 3,690,584.37
  5. Step 5: Solve for x
    x = 3,690,584.37/1,603.80
  6. Step 6: Final answer
    x = 2,301.15

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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.