Home / 1,603.48-2,211.32-1,288.12

Finding the Fourth Proportional to 1,603.48, 2,211.32 and 1,288.12

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Solution

The fourth proportional to 1,603.48, 2,211.32 and 1,288.12 is: 1,776.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,603.48 : 2,211.32 = 1,288.12 : x
  2. Step 2: Convert to fraction form
    1,603.48/2,211.32 = 1,288.12/x
  3. Step 3: Cross multiply
    1,603.48x = 2,211.32 × 1,288.12
  4. Step 4: Simplify right side
    1,603.48x = 2,848,445.52
  5. Step 5: Solve for x
    x = 2,848,445.52/1,603.48
  6. Step 6: Final answer
    x = 1,776.41

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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.