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Finding the Fourth Proportional to 528.33, 728.01 and 404.01

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Solution

The fourth proportional to 528.33, 728.01 and 404.01 is: 556.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    528.33 : 728.01 = 404.01 : x
  2. Step 2: Convert to fraction form
    528.33/728.01 = 404.01/x
  3. Step 3: Cross multiply
    528.33x = 728.01 × 404.01
  4. Step 4: Simplify right side
    528.33x = 294,123.32
  5. Step 5: Solve for x
    x = 294,123.32/528.33
  6. Step 6: Final answer
    x = 556.70

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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.