Home / 1,720.69-2,586.81-1,377.78

Finding the Fourth Proportional to 1,720.69, 2,586.81 and 1,377.78

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Solution

The fourth proportional to 1,720.69, 2,586.81 and 1,377.78 is: 2,071.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,720.69 : 2,586.81 = 1,377.78 : x
  2. Step 2: Convert to fraction form
    1,720.69/2,586.81 = 1,377.78/x
  3. Step 3: Cross multiply
    1,720.69x = 2,586.81 × 1,377.78
  4. Step 4: Simplify right side
    1,720.69x = 3,564,068.50
  5. Step 5: Solve for x
    x = 3,564,068.50/1,720.69
  6. Step 6: Final answer
    x = 2,071.30

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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.