Home / 2,547.15-3,515.21-1,428.45

Finding the Fourth Proportional to 2,547.15, 3,515.21 and 1,428.45

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Solution

The fourth proportional to 2,547.15, 3,515.21 and 1,428.45 is: 1,971.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,547.15 : 3,515.21 = 1,428.45 : x
  2. Step 2: Convert to fraction form
    2,547.15/3,515.21 = 1,428.45/x
  3. Step 3: Cross multiply
    2,547.15x = 3,515.21 × 1,428.45
  4. Step 4: Simplify right side
    2,547.15x = 5,021,301.72
  5. Step 5: Solve for x
    x = 5,021,301.72/2,547.15
  6. Step 6: Final answer
    x = 1,971.34

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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.