Home / 1,325.14-1,987.98-459.46

Finding the Fourth Proportional to 1,325.14, 1,987.98 and 459.46

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Solution

The fourth proportional to 1,325.14, 1,987.98 and 459.46 is: 689.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,325.14 : 1,987.98 = 459.46 : x
  2. Step 2: Convert to fraction form
    1,325.14/1,987.98 = 459.46/x
  3. Step 3: Cross multiply
    1,325.14x = 1,987.98 × 459.46
  4. Step 4: Simplify right side
    1,325.14x = 913,397.29
  5. Step 5: Solve for x
    x = 913,397.29/1,325.14
  6. Step 6: Final answer
    x = 689.28

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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.