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Finding the Fourth Proportional to 554, 763.20 and 528.08

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Solution

The fourth proportional to 554, 763.20 and 528.08 is: 727.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    554 : 763.20 = 528.08 : x
  2. Step 2: Convert to fraction form
    554/763.20 = 528.08/x
  3. Step 3: Cross multiply
    554x = 763.20 × 528.08
  4. Step 4: Simplify right side
    554x = 403,030.66
  5. Step 5: Solve for x
    x = 403,030.66/554
  6. Step 6: Final answer
    x = 727.49

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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.