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Finding the Fourth Proportional to 510.74, 765.42 and 328.04

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Solution

The fourth proportional to 510.74, 765.42 and 328.04 is: 491.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    510.74 : 765.42 = 328.04 : x
  2. Step 2: Convert to fraction form
    510.74/765.42 = 328.04/x
  3. Step 3: Cross multiply
    510.74x = 765.42 × 328.04
  4. Step 4: Simplify right side
    510.74x = 251,088.38
  5. Step 5: Solve for x
    x = 251,088.38/510.74
  6. Step 6: Final answer
    x = 491.62

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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.