Home / 1,570.90-2,166.88-1,039.81

Finding the Fourth Proportional to 1,570.90, 2,166.88 and 1,039.81

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Solution

The fourth proportional to 1,570.90, 2,166.88 and 1,039.81 is: 1,434.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,570.90 : 2,166.88 = 1,039.81 : x
  2. Step 2: Convert to fraction form
    1,570.90/2,166.88 = 1,039.81/x
  3. Step 3: Cross multiply
    1,570.90x = 2,166.88 × 1,039.81
  4. Step 4: Simplify right side
    1,570.90x = 2,253,143.49
  5. Step 5: Solve for x
    x = 2,253,143.49/1,570.90
  6. Step 6: Final answer
    x = 1,434.30

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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.