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Finding the Fourth Proportional to 755.19, 1,042.17 and 456.45

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Solution

The fourth proportional to 755.19, 1,042.17 and 456.45 is: 629.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    755.19 : 1,042.17 = 456.45 : x
  2. Step 2: Convert to fraction form
    755.19/1,042.17 = 456.45/x
  3. Step 3: Cross multiply
    755.19x = 1,042.17 × 456.45
  4. Step 4: Simplify right side
    755.19x = 475,692.88
  5. Step 5: Solve for x
    x = 475,692.88/755.19
  6. Step 6: Final answer
    x = 629.90

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Double scale
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1.5x scale

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.