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Finding the Fourth Proportional to 529.38, 730.40 and 308.26

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Solution

The fourth proportional to 529.38, 730.40 and 308.26 is: 425.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    529.38 : 730.40 = 308.26 : x
  2. Step 2: Convert to fraction form
    529.38/730.40 = 308.26/x
  3. Step 3: Cross multiply
    529.38x = 730.40 × 308.26
  4. Step 4: Simplify right side
    529.38x = 225,153.10
  5. Step 5: Solve for x
    x = 225,153.10/529.38
  6. Step 6: Final answer
    x = 425.31

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1.5x scale

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.