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Finding the Fourth Proportional to 510.16, 765.40 and 221.60

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Solution

The fourth proportional to 510.16, 765.40 and 221.60 is: 332.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    510.16 : 765.40 = 221.60 : x
  2. Step 2: Convert to fraction form
    510.16/765.40 = 221.60/x
  3. Step 3: Cross multiply
    510.16x = 765.40 × 221.60
  4. Step 4: Simplify right side
    510.16x = 169,612.64
  5. Step 5: Solve for x
    x = 169,612.64/510.16
  6. Step 6: Final answer
    x = 332.47

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.