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Finding the Fourth Proportional to 528.76, 728.94 and 450.28

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Solution

The fourth proportional to 528.76, 728.94 and 450.28 is: 620.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    528.76 : 728.94 = 450.28 : x
  2. Step 2: Convert to fraction form
    528.76/728.94 = 450.28/x
  3. Step 3: Cross multiply
    528.76x = 728.94 × 450.28
  4. Step 4: Simplify right side
    528.76x = 328,227.10
  5. Step 5: Solve for x
    x = 328,227.10/528.76
  6. Step 6: Final answer
    x = 620.75

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Find fourth proportional to 264.38, 364.47 and 225.14
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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.