Home / 1,415.61-2,121.45-1,206.29

Finding the Fourth Proportional to 1,415.61, 2,121.45 and 1,206.29

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Solution

The fourth proportional to 1,415.61, 2,121.45 and 1,206.29 is: 1,807.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,415.61 : 2,121.45 = 1,206.29 : x
  2. Step 2: Convert to fraction form
    1,415.61/2,121.45 = 1,206.29/x
  3. Step 3: Cross multiply
    1,415.61x = 2,121.45 × 1,206.29
  4. Step 4: Simplify right side
    1,415.61x = 2,559,084.70
  5. Step 5: Solve for x
    x = 2,559,084.70/1,415.61
  6. Step 6: Final answer
    x = 1,807.76

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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.