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Finding the Fourth Proportional to 755.62, 1,132.63 and 430.29

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Solution

The fourth proportional to 755.62, 1,132.63 and 430.29 is: 644.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    755.62 : 1,132.63 = 430.29 : x
  2. Step 2: Convert to fraction form
    755.62/1,132.63 = 430.29/x
  3. Step 3: Cross multiply
    755.62x = 1,132.63 × 430.29
  4. Step 4: Simplify right side
    755.62x = 487,359.36
  5. Step 5: Solve for x
    x = 487,359.36/755.62
  6. Step 6: Final answer
    x = 644.98

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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.