Home / 2,505.79-3,457.89-1,386.92

Finding the Fourth Proportional to 2,505.79, 3,457.89 and 1,386.92

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Solution

The fourth proportional to 2,505.79, 3,457.89 and 1,386.92 is: 1,913.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,505.79 : 3,457.89 = 1,386.92 : x
  2. Step 2: Convert to fraction form
    2,505.79/3,457.89 = 1,386.92/x
  3. Step 3: Cross multiply
    2,505.79x = 3,457.89 × 1,386.92
  4. Step 4: Simplify right side
    2,505.79x = 4,795,825.44
  5. Step 5: Solve for x
    x = 4,795,825.44/2,505.79
  6. Step 6: Final answer
    x = 1,913.90

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1.5x scale

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.