Home / 2,570.81-3,547.70-1,391.87

Finding the Fourth Proportional to 2,570.81, 3,547.70 and 1,391.87

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Solution

The fourth proportional to 2,570.81, 3,547.70 and 1,391.87 is: 1,920.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,570.81 : 3,547.70 = 1,391.87 : x
  2. Step 2: Convert to fraction form
    2,570.81/3,547.70 = 1,391.87/x
  3. Step 3: Cross multiply
    2,570.81x = 3,547.70 × 1,391.87
  4. Step 4: Simplify right side
    2,570.81x = 4,937,912.50
  5. Step 5: Solve for x
    x = 4,937,912.50/2,570.81
  6. Step 6: Final answer
    x = 1,920.77

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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.