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Finding the Fourth Proportional to 510.05, 703.89 and 289.07

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Solution

The fourth proportional to 510.05, 703.89 and 289.07 is: 398.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    510.05 : 703.89 = 289.07 : x
  2. Step 2: Convert to fraction form
    510.05/703.89 = 289.07/x
  3. Step 3: Cross multiply
    510.05x = 703.89 × 289.07
  4. Step 4: Simplify right side
    510.05x = 203,473.48
  5. Step 5: Solve for x
    x = 203,473.48/510.05
  6. Step 6: Final answer
    x = 398.93

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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.