Home / 1,570.11-2,168.19-1,011.87

Finding the Fourth Proportional to 1,570.11, 2,168.19 and 1,011.87

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Solution

The fourth proportional to 1,570.11, 2,168.19 and 1,011.87 is: 1,397.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,570.11 : 2,168.19 = 1,011.87 : x
  2. Step 2: Convert to fraction form
    1,570.11/2,168.19 = 1,011.87/x
  3. Step 3: Cross multiply
    1,570.11x = 2,168.19 × 1,011.87
  4. Step 4: Simplify right side
    1,570.11x = 2,193,926.42
  5. Step 5: Solve for x
    x = 2,193,926.42/1,570.11
  6. Step 6: Final answer
    x = 1,397.31

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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.