Home / 2,570.40-3,547.11-1,391.46

Finding the Fourth Proportional to 2,570.40, 3,547.11 and 1,391.46

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Solution

The fourth proportional to 2,570.40, 3,547.11 and 1,391.46 is: 1,920.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,570.40 : 3,547.11 = 1,391.46 : x
  2. Step 2: Convert to fraction form
    2,570.40/3,547.11 = 1,391.46/x
  3. Step 3: Cross multiply
    2,570.40x = 3,547.11 × 1,391.46
  4. Step 4: Simplify right side
    2,570.40x = 4,935,661.68
  5. Step 5: Solve for x
    x = 4,935,661.68/2,570.40
  6. Step 6: Final answer
    x = 1,920.19

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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.