Home / 1,570.31-2,168.49-1,011.75

Finding the Fourth Proportional to 1,570.31, 2,168.49 and 1,011.75

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Solution

The fourth proportional to 1,570.31, 2,168.49 and 1,011.75 is: 1,397.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,570.31 : 2,168.49 = 1,011.75 : x
  2. Step 2: Convert to fraction form
    1,570.31/2,168.49 = 1,011.75/x
  3. Step 3: Cross multiply
    1,570.31x = 2,168.49 × 1,011.75
  4. Step 4: Simplify right side
    1,570.31x = 2,193,969.76
  5. Step 5: Solve for x
    x = 2,193,969.76/1,570.31
  6. Step 6: Final answer
    x = 1,397.16

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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.