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Finding the Fourth Proportional to 529.60, 730.88 and 322.60

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Solution

The fourth proportional to 529.60, 730.88 and 322.60 is: 445.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    529.60 : 730.88 = 322.60 : x
  2. Step 2: Convert to fraction form
    529.60/730.88 = 322.60/x
  3. Step 3: Cross multiply
    529.60x = 730.88 × 322.60
  4. Step 4: Simplify right side
    529.60x = 235,781.89
  5. Step 5: Solve for x
    x = 235,781.89/529.60
  6. Step 6: Final answer
    x = 445.21

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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.