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Finding the Fourth Proportional to 1,135.90, 1,703.01 and 433.01

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Solution

The fourth proportional to 1,135.90, 1,703.01 and 433.01 is: 649.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,135.90 : 1,703.01 = 433.01 : x
  2. Step 2: Convert to fraction form
    1,135.90/1,703.01 = 433.01/x
  3. Step 3: Cross multiply
    1,135.90x = 1,703.01 × 433.01
  4. Step 4: Simplify right side
    1,135.90x = 737,418.45
  5. Step 5: Solve for x
    x = 737,418.45/1,135.90
  6. Step 6: Final answer
    x = 649.19

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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.