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Finding the Fourth Proportional to 528.49, 729.83 and 436.15

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Solution

The fourth proportional to 528.49, 729.83 and 436.15 is: 602.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    528.49 : 729.83 = 436.15 : x
  2. Step 2: Convert to fraction form
    528.49/729.83 = 436.15/x
  3. Step 3: Cross multiply
    528.49x = 729.83 × 436.15
  4. Step 4: Simplify right side
    528.49x = 318,315.35
  5. Step 5: Solve for x
    x = 318,315.35/528.49
  6. Step 6: Final answer
    x = 602.31

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.