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Finding the Fourth Proportional to 880.64, 1,320.21 and 555.29

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Solution

The fourth proportional to 880.64, 1,320.21 and 555.29 is: 832.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    880.64 : 1,320.21 = 555.29 : x
  2. Step 2: Convert to fraction form
    880.64/1,320.21 = 555.29/x
  3. Step 3: Cross multiply
    880.64x = 1,320.21 × 555.29
  4. Step 4: Simplify right side
    880.64x = 733,090.03
  5. Step 5: Solve for x
    x = 733,090.03/880.64
  6. Step 6: Final answer
    x = 832.46

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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.