Home / 2,262.34-3,390.81-1,287.10

Finding the Fourth Proportional to 2,262.34, 3,390.81 and 1,287.10

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Solution

The fourth proportional to 2,262.34, 3,390.81 and 1,287.10 is: 1,929.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,262.34 : 3,390.81 = 1,287.10 : x
  2. Step 2: Convert to fraction form
    2,262.34/3,390.81 = 1,287.10/x
  3. Step 3: Cross multiply
    2,262.34x = 3,390.81 × 1,287.10
  4. Step 4: Simplify right side
    2,262.34x = 4,364,311.55
  5. Step 5: Solve for x
    x = 4,364,311.55/2,262.34
  6. Step 6: Final answer
    x = 1,929.11

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1.5x scale

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.