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Finding the Fourth Proportional to 510.03, 703.68 and 288.90

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Solution

The fourth proportional to 510.03, 703.68 and 288.90 is: 398.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    510.03 : 703.68 = 288.90 : x
  2. Step 2: Convert to fraction form
    510.03/703.68 = 288.90/x
  3. Step 3: Cross multiply
    510.03x = 703.68 × 288.90
  4. Step 4: Simplify right side
    510.03x = 203,293.15
  5. Step 5: Solve for x
    x = 203,293.15/510.03
  6. Step 6: Final answer
    x = 398.59

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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.