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Finding the Fourth Proportional to 1,170.75, 1,755.51 and 477.03

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Solution

The fourth proportional to 1,170.75, 1,755.51 and 477.03 is: 715.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,170.75 : 1,755.51 = 477.03 : x
  2. Step 2: Convert to fraction form
    1,170.75/1,755.51 = 477.03/x
  3. Step 3: Cross multiply
    1,170.75x = 1,755.51 × 477.03
  4. Step 4: Simplify right side
    1,170.75x = 837,430.94
  5. Step 5: Solve for x
    x = 837,430.94/1,170.75
  6. Step 6: Final answer
    x = 715.29

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.