Home / 2,547.60-3,515.28-1,428.58

Finding the Fourth Proportional to 2,547.60, 3,515.28 and 1,428.58

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Solution

The fourth proportional to 2,547.60, 3,515.28 and 1,428.58 is: 1,971.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,547.60 : 3,515.28 = 1,428.58 : x
  2. Step 2: Convert to fraction form
    2,547.60/3,515.28 = 1,428.58/x
  3. Step 3: Cross multiply
    2,547.60x = 3,515.28 × 1,428.58
  4. Step 4: Simplify right side
    2,547.60x = 5,021,858.70
  5. Step 5: Solve for x
    x = 5,021,858.70/2,547.60
  6. Step 6: Final answer
    x = 1,971.21

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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.