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Finding the Fourth Proportional to 529.17, 730.40 and 319.36

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Solution

The fourth proportional to 529.17, 730.40 and 319.36 is: 440.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    529.17 : 730.40 = 319.36 : x
  2. Step 2: Convert to fraction form
    529.17/730.40 = 319.36/x
  3. Step 3: Cross multiply
    529.17x = 730.40 × 319.36
  4. Step 4: Simplify right side
    529.17x = 233,260.54
  5. Step 5: Solve for x
    x = 233,260.54/529.17
  6. Step 6: Final answer
    x = 440.80

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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.