Home / 1,325.16-1,987.76-351.40

Finding the Fourth Proportional to 1,325.16, 1,987.76 and 351.40

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Solution

The fourth proportional to 1,325.16, 1,987.76 and 351.40 is: 527.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,325.16 : 1,987.76 = 351.40 : x
  2. Step 2: Convert to fraction form
    1,325.16/1,987.76 = 351.40/x
  3. Step 3: Cross multiply
    1,325.16x = 1,987.76 × 351.40
  4. Step 4: Simplify right side
    1,325.16x = 698,498.86
  5. Step 5: Solve for x
    x = 698,498.86/1,325.16
  6. Step 6: Final answer
    x = 527.11

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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.