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Finding the Fourth Proportional to 1,603.67, 2,406.78 and 630.45

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Solution

The fourth proportional to 1,603.67, 2,406.78 and 630.45 is: 946.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,603.67 : 2,406.78 = 630.45 : x
  2. Step 2: Convert to fraction form
    1,603.67/2,406.78 = 630.45/x
  3. Step 3: Cross multiply
    1,603.67x = 2,406.78 × 630.45
  4. Step 4: Simplify right side
    1,603.67x = 1,517,354.45
  5. Step 5: Solve for x
    x = 1,517,354.45/1,603.67
  6. Step 6: Final answer
    x = 946.18

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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.