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Finding the Fourth Proportional to 767.72, 1,059.40 and 452.99

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Solution

The fourth proportional to 767.72, 1,059.40 and 452.99 is: 625.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    767.72 : 1,059.40 = 452.99 : x
  2. Step 2: Convert to fraction form
    767.72/1,059.40 = 452.99/x
  3. Step 3: Cross multiply
    767.72x = 1,059.40 × 452.99
  4. Step 4: Simplify right side
    767.72x = 479,901.39
  5. Step 5: Solve for x
    x = 479,901.39/767.72
  6. Step 6: Final answer
    x = 625.10

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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.