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Finding the Fourth Proportional to 529.33, 729.39 and 405.01

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Solution

The fourth proportional to 529.33, 729.39 and 405.01 is: 558.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    529.33 : 729.39 = 405.01 : x
  2. Step 2: Convert to fraction form
    529.33/729.39 = 405.01/x
  3. Step 3: Cross multiply
    529.33x = 729.39 × 405.01
  4. Step 4: Simplify right side
    529.33x = 295,410.24
  5. Step 5: Solve for x
    x = 295,410.24/529.33
  6. Step 6: Final answer
    x = 558.08

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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.