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Finding the Fourth Proportional to 1,885.92, 2,602.65 and 1,139.88

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Solution

The fourth proportional to 1,885.92, 2,602.65 and 1,139.88 is: 1,573.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,885.92 : 2,602.65 = 1,139.88 : x
  2. Step 2: Convert to fraction form
    1,885.92/2,602.65 = 1,139.88/x
  3. Step 3: Cross multiply
    1,885.92x = 2,602.65 × 1,139.88
  4. Step 4: Simplify right side
    1,885.92x = 2,966,708.68
  5. Step 5: Solve for x
    x = 2,966,708.68/1,885.92
  6. Step 6: Final answer
    x = 1,573.08

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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.