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Finding the Fourth Proportional to 1,603.35, 2,406.53 and 988.26

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Solution

The fourth proportional to 1,603.35, 2,406.53 and 988.26 is: 1,483.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,603.35 : 2,406.53 = 988.26 : x
  2. Step 2: Convert to fraction form
    1,603.35/2,406.53 = 988.26/x
  3. Step 3: Cross multiply
    1,603.35x = 2,406.53 × 988.26
  4. Step 4: Simplify right side
    1,603.35x = 2,378,277.34
  5. Step 5: Solve for x
    x = 2,378,277.34/1,603.35
  6. Step 6: Final answer
    x = 1,483.32

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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.