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Finding the Fourth Proportional to 1,021.95, 1,533.20 and 528.63

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Solution

The fourth proportional to 1,021.95, 1,533.20 and 528.63 is: 793.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,021.95 : 1,533.20 = 528.63 : x
  2. Step 2: Convert to fraction form
    1,021.95/1,533.20 = 528.63/x
  3. Step 3: Cross multiply
    1,021.95x = 1,533.20 × 528.63
  4. Step 4: Simplify right side
    1,021.95x = 810,487.12
  5. Step 5: Solve for x
    x = 810,487.12/1,021.95
  6. Step 6: Final answer
    x = 793.08

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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.