Home / 1,262.01-1,890.30-611.40

Finding the Fourth Proportional to 1,262.01, 1,890.30 and 611.40

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Solution

The fourth proportional to 1,262.01, 1,890.30 and 611.40 is: 915.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,262.01 : 1,890.30 = 611.40 : x
  2. Step 2: Convert to fraction form
    1,262.01/1,890.30 = 611.40/x
  3. Step 3: Cross multiply
    1,262.01x = 1,890.30 × 611.40
  4. Step 4: Simplify right side
    1,262.01x = 1,155,729.42
  5. Step 5: Solve for x
    x = 1,155,729.42/1,262.01
  6. Step 6: Final answer
    x = 915.78

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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.