Home / 2,547.80-3,515.70-1,428.68

Finding the Fourth Proportional to 2,547.80, 3,515.70 and 1,428.68

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Solution

The fourth proportional to 2,547.80, 3,515.70 and 1,428.68 is: 1,971.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,547.80 : 3,515.70 = 1,428.68 : x
  2. Step 2: Convert to fraction form
    2,547.80/3,515.70 = 1,428.68/x
  3. Step 3: Cross multiply
    2,547.80x = 3,515.70 × 1,428.68
  4. Step 4: Simplify right side
    2,547.80x = 5,022,810.28
  5. Step 5: Solve for x
    x = 5,022,810.28/2,547.80
  6. Step 6: Final answer
    x = 1,971.43

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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.