Home / 1,420.11-1,960.65-1,087.92

Finding the Fourth Proportional to 1,420.11, 1,960.65 and 1,087.92

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Solution

The fourth proportional to 1,420.11, 1,960.65 and 1,087.92 is: 1,502.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,420.11 : 1,960.65 = 1,087.92 : x
  2. Step 2: Convert to fraction form
    1,420.11/1,960.65 = 1,087.92/x
  3. Step 3: Cross multiply
    1,420.11x = 1,960.65 × 1,087.92
  4. Step 4: Simplify right side
    1,420.11x = 2,133,030.35
  5. Step 5: Solve for x
    x = 2,133,030.35/1,420.11
  6. Step 6: Final answer
    x = 1,502.02

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.