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Finding the Fourth Proportional to 528.75, 729.33 and 351.69

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Solution

The fourth proportional to 528.75, 729.33 and 351.69 is: 485.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    528.75 : 729.33 = 351.69 : x
  2. Step 2: Convert to fraction form
    528.75/729.33 = 351.69/x
  3. Step 3: Cross multiply
    528.75x = 729.33 × 351.69
  4. Step 4: Simplify right side
    528.75x = 256,498.07
  5. Step 5: Solve for x
    x = 256,498.07/528.75
  6. Step 6: Final answer
    x = 485.10

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Find fourth proportional to 264.38, 364.67 and 175.85
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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.