Home / 1,647.20-2,279.12-1,437.84

Finding the Fourth Proportional to 1,647.20, 2,279.12 and 1,437.84

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Solution

The fourth proportional to 1,647.20, 2,279.12 and 1,437.84 is: 1,989.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,647.20 : 2,279.12 = 1,437.84 : x
  2. Step 2: Convert to fraction form
    1,647.20/2,279.12 = 1,437.84/x
  3. Step 3: Cross multiply
    1,647.20x = 2,279.12 × 1,437.84
  4. Step 4: Simplify right side
    1,647.20x = 3,277,009.90
  5. Step 5: Solve for x
    x = 3,277,009.90/1,647.20
  6. Step 6: Final answer
    x = 1,989.44

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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.