Home / 1,621.61-2,431.90-525.75

Finding the Fourth Proportional to 1,621.61, 2,431.90 and 525.75

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Solution

The fourth proportional to 1,621.61, 2,431.90 and 525.75 is: 788.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,621.61 : 2,431.90 = 525.75 : x
  2. Step 2: Convert to fraction form
    1,621.61/2,431.90 = 525.75/x
  3. Step 3: Cross multiply
    1,621.61x = 2,431.90 × 525.75
  4. Step 4: Simplify right side
    1,621.61x = 1,278,562.96
  5. Step 5: Solve for x
    x = 1,278,562.96/1,621.61
  6. Step 6: Final answer
    x = 788.45

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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.