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Finding the Fourth Proportional to 1,127.11, 1,555.43 and 655.05

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Solution

The fourth proportional to 1,127.11, 1,555.43 and 655.05 is: 903.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,127.11 : 1,555.43 = 655.05 : x
  2. Step 2: Convert to fraction form
    1,127.11/1,555.43 = 655.05/x
  3. Step 3: Cross multiply
    1,127.11x = 1,555.43 × 655.05
  4. Step 4: Simplify right side
    1,127.11x = 1,018,873.37
  5. Step 5: Solve for x
    x = 1,018,873.37/1,127.11
  6. Step 6: Final answer
    x = 903.97

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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.