Home / 1,423-2,130.40-1,274.80

Finding the Fourth Proportional to 1,423, 2,130.40 and 1,274.80

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Solution

The fourth proportional to 1,423, 2,130.40 and 1,274.80 is: 1,908.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,423 : 2,130.40 = 1,274.80 : x
  2. Step 2: Convert to fraction form
    1,423/2,130.40 = 1,274.80/x
  3. Step 3: Cross multiply
    1,423x = 2,130.40 × 1,274.80
  4. Step 4: Simplify right side
    1,423x = 2,715,833.92
  5. Step 5: Solve for x
    x = 2,715,833.92/1,423
  6. Step 6: Final answer
    x = 1,908.53

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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.