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Finding the Fourth Proportional to 1,127.16, 1,555.27 and 655.11

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Solution

The fourth proportional to 1,127.16, 1,555.27 and 655.11 is: 903.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,127.16 : 1,555.27 = 655.11 : x
  2. Step 2: Convert to fraction form
    1,127.16/1,555.27 = 655.11/x
  3. Step 3: Cross multiply
    1,127.16x = 1,555.27 × 655.11
  4. Step 4: Simplify right side
    1,127.16x = 1,018,872.93
  5. Step 5: Solve for x
    x = 1,018,872.93/1,127.16
  6. Step 6: Final answer
    x = 903.93

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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.