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Finding the Fourth Proportional to 1,603.16, 2,400.64 and 1,420.00

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Solution

The fourth proportional to 1,603.16, 2,400.64 and 1,420.00 is: 2,126.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,603.16 : 2,400.64 = 1,420.00 : x
  2. Step 2: Convert to fraction form
    1,603.16/2,400.64 = 1,420.00/x
  3. Step 3: Cross multiply
    1,603.16x = 2,400.64 × 1,420.00
  4. Step 4: Simplify right side
    1,603.16x = 3,408,913.58
  5. Step 5: Solve for x
    x = 3,408,913.58/1,603.16
  6. Step 6: Final answer
    x = 2,126.37

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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.