Home / 1,325.46-1,988.19-459.75

Finding the Fourth Proportional to 1,325.46, 1,988.19 and 459.75

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Solution

The fourth proportional to 1,325.46, 1,988.19 and 459.75 is: 689.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,325.46 : 1,988.19 = 459.75 : x
  2. Step 2: Convert to fraction form
    1,325.46/1,988.19 = 459.75/x
  3. Step 3: Cross multiply
    1,325.46x = 1,988.19 × 459.75
  4. Step 4: Simplify right side
    1,325.46x = 914,070.35
  5. Step 5: Solve for x
    x = 914,070.35/1,325.46
  6. Step 6: Final answer
    x = 689.63

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1.5x scale

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.