Home / 1,931.76-2,666.25-1,186.11

Finding the Fourth Proportional to 1,931.76, 2,666.25 and 1,186.11

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Solution

The fourth proportional to 1,931.76, 2,666.25 and 1,186.11 is: 1,637.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,931.76 : 2,666.25 = 1,186.11 : x
  2. Step 2: Convert to fraction form
    1,931.76/2,666.25 = 1,186.11/x
  3. Step 3: Cross multiply
    1,931.76x = 2,666.25 × 1,186.11
  4. Step 4: Simplify right side
    1,931.76x = 3,162,465.79
  5. Step 5: Solve for x
    x = 3,162,465.79/1,931.76
  6. Step 6: Final answer
    x = 1,637.09

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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.