Home / 1,621.27-2,431.29-525.34

Finding the Fourth Proportional to 1,621.27, 2,431.29 and 525.34

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Solution

The fourth proportional to 1,621.27, 2,431.29 and 525.34 is: 787.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,621.27 : 2,431.29 = 525.34 : x
  2. Step 2: Convert to fraction form
    1,621.27/2,431.29 = 525.34/x
  3. Step 3: Cross multiply
    1,621.27x = 2,431.29 × 525.34
  4. Step 4: Simplify right side
    1,621.27x = 1,277,253.89
  5. Step 5: Solve for x
    x = 1,277,253.89/1,621.27
  6. Step 6: Final answer
    x = 787.81

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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.