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Finding the Fourth Proportional to 510.21, 763.20 and 347.54

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Solution

The fourth proportional to 510.21, 763.20 and 347.54 is: 519.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    510.21 : 763.20 = 347.54 : x
  2. Step 2: Convert to fraction form
    510.21/763.20 = 347.54/x
  3. Step 3: Cross multiply
    510.21x = 763.20 × 347.54
  4. Step 4: Simplify right side
    510.21x = 265,238.71
  5. Step 5: Solve for x
    x = 265,238.71/510.21
  6. Step 6: Final answer
    x = 519.86

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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.