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Finding the Fourth Proportional to 510.45, 704.35 and 289.38

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Solution

The fourth proportional to 510.45, 704.35 and 289.38 is: 399.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    510.45 : 704.35 = 289.38 : x
  2. Step 2: Convert to fraction form
    510.45/704.35 = 289.38/x
  3. Step 3: Cross multiply
    510.45x = 704.35 × 289.38
  4. Step 4: Simplify right side
    510.45x = 203,824.80
  5. Step 5: Solve for x
    x = 203,824.80/510.45
  6. Step 6: Final answer
    x = 399.30

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1.5x scale

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.