Home / 2,505.71-3,457.85-1,386.68

Finding the Fourth Proportional to 2,505.71, 3,457.85 and 1,386.68

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Solution

The fourth proportional to 2,505.71, 3,457.85 and 1,386.68 is: 1,913.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,505.71 : 3,457.85 = 1,386.68 : x
  2. Step 2: Convert to fraction form
    2,505.71/3,457.85 = 1,386.68/x
  3. Step 3: Cross multiply
    2,505.71x = 3,457.85 × 1,386.68
  4. Step 4: Simplify right side
    2,505.71x = 4,794,907.22
  5. Step 5: Solve for x
    x = 4,794,907.22/2,505.71
  6. Step 6: Final answer
    x = 1,913.60

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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.