Home / 1,407.45-2,109.15-540.75

Finding the Fourth Proportional to 1,407.45, 2,109.15 and 540.75

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Solution

The fourth proportional to 1,407.45, 2,109.15 and 540.75 is: 810.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,407.45 : 2,109.15 = 540.75 : x
  2. Step 2: Convert to fraction form
    1,407.45/2,109.15 = 540.75/x
  3. Step 3: Cross multiply
    1,407.45x = 2,109.15 × 540.75
  4. Step 4: Simplify right side
    1,407.45x = 1,140,522.86
  5. Step 5: Solve for x
    x = 1,140,522.86/1,407.45
  6. Step 6: Final answer
    x = 810.35

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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.