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Finding the Fourth Proportional to 730.64, 1,008.60 and 436.16

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Solution

The fourth proportional to 730.64, 1,008.60 and 436.16 is: 602.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    730.64 : 1,008.60 = 436.16 : x
  2. Step 2: Convert to fraction form
    730.64/1,008.60 = 436.16/x
  3. Step 3: Cross multiply
    730.64x = 1,008.60 × 436.16
  4. Step 4: Simplify right side
    730.64x = 439,910.98
  5. Step 5: Solve for x
    x = 439,910.98/730.64
  6. Step 6: Final answer
    x = 602.09

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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.