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Finding the Fourth Proportional to 529.08, 730.20 and 305.10

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Solution

The fourth proportional to 529.08, 730.20 and 305.10 is: 421.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    529.08 : 730.20 = 305.10 : x
  2. Step 2: Convert to fraction form
    529.08/730.20 = 305.10/x
  3. Step 3: Cross multiply
    529.08x = 730.20 × 305.10
  4. Step 4: Simplify right side
    529.08x = 222,784.02
  5. Step 5: Solve for x
    x = 222,784.02/529.08
  6. Step 6: Final answer
    x = 421.08

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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.