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Finding the Fourth Proportional to 1,047.90, 1,447.02 and 655.59

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Solution

The fourth proportional to 1,047.90, 1,447.02 and 655.59 is: 905.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,047.90 : 1,447.02 = 655.59 : x
  2. Step 2: Convert to fraction form
    1,047.90/1,447.02 = 655.59/x
  3. Step 3: Cross multiply
    1,047.90x = 1,447.02 × 655.59
  4. Step 4: Simplify right side
    1,047.90x = 948,651.84
  5. Step 5: Solve for x
    x = 948,651.84/1,047.90
  6. Step 6: Final answer
    x = 905.29

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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.