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Finding the Fourth Proportional to 555.28, 832.20 and 433.36

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Solution

The fourth proportional to 555.28, 832.20 and 433.36 is: 649.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    555.28 : 832.20 = 433.36 : x
  2. Step 2: Convert to fraction form
    555.28/832.20 = 433.36/x
  3. Step 3: Cross multiply
    555.28x = 832.20 × 433.36
  4. Step 4: Simplify right side
    555.28x = 360,642.19
  5. Step 5: Solve for x
    x = 360,642.19/555.28
  6. Step 6: Final answer
    x = 649.48

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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.