Home / 1,931.79-2,902.30-1,239.82

Finding the Fourth Proportional to 1,931.79, 2,902.30 and 1,239.82

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Solution

The fourth proportional to 1,931.79, 2,902.30 and 1,239.82 is: 1,862.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,931.79 : 2,902.30 = 1,239.82 : x
  2. Step 2: Convert to fraction form
    1,931.79/2,902.30 = 1,239.82/x
  3. Step 3: Cross multiply
    1,931.79x = 2,902.30 × 1,239.82
  4. Step 4: Simplify right side
    1,931.79x = 3,598,315.07
  5. Step 5: Solve for x
    x = 3,598,315.07/1,931.79
  6. Step 6: Final answer
    x = 1,862.68

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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.