Home / 1,555.21-2,332.91-459.60

Finding the Fourth Proportional to 1,555.21, 2,332.91 and 459.60

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Solution

The fourth proportional to 1,555.21, 2,332.91 and 459.60 is: 689.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,555.21 : 2,332.91 = 459.60 : x
  2. Step 2: Convert to fraction form
    1,555.21/2,332.91 = 459.60/x
  3. Step 3: Cross multiply
    1,555.21x = 2,332.91 × 459.60
  4. Step 4: Simplify right side
    1,555.21x = 1,072,205.44
  5. Step 5: Solve for x
    x = 1,072,205.44/1,555.21
  6. Step 6: Final answer
    x = 689.43

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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.