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Finding the Fourth Proportional to 1,021.88, 1,533.02 and 436.88

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Solution

The fourth proportional to 1,021.88, 1,533.02 and 436.88 is: 655.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,021.88 : 1,533.02 = 436.88 : x
  2. Step 2: Convert to fraction form
    1,021.88/1,533.02 = 436.88/x
  3. Step 3: Cross multiply
    1,021.88x = 1,533.02 × 436.88
  4. Step 4: Simplify right side
    1,021.88x = 669,735.93
  5. Step 5: Solve for x
    x = 669,735.93/1,021.88
  6. Step 6: Final answer
    x = 655.40

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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.