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Finding the Fourth Proportional to 704.90, 1,057.25 and 510.25

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Solution

The fourth proportional to 704.90, 1,057.25 and 510.25 is: 765.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    704.90 : 1,057.25 = 510.25 : x
  2. Step 2: Convert to fraction form
    704.90/1,057.25 = 510.25/x
  3. Step 3: Cross multiply
    704.90x = 1,057.25 × 510.25
  4. Step 4: Simplify right side
    704.90x = 539,462.43
  5. Step 5: Solve for x
    x = 539,462.43/704.90
  6. Step 6: Final answer
    x = 765.30

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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.