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Finding the Fourth Proportional to 1,021.32, 1,531.02 and 533.64

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Solution

The fourth proportional to 1,021.32, 1,531.02 and 533.64 is: 799.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,021.32 : 1,531.02 = 533.64 : x
  2. Step 2: Convert to fraction form
    1,021.32/1,531.02 = 533.64/x
  3. Step 3: Cross multiply
    1,021.32x = 1,531.02 × 533.64
  4. Step 4: Simplify right side
    1,021.32x = 817,013.51
  5. Step 5: Solve for x
    x = 817,013.51/1,021.32
  6. Step 6: Final answer
    x = 799.96

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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.