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Finding the Fourth Proportional to 709.69, 1,059.75 and 579.95

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Solution

The fourth proportional to 709.69, 1,059.75 and 579.95 is: 866.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    709.69 : 1,059.75 = 579.95 : x
  2. Step 2: Convert to fraction form
    709.69/1,059.75 = 579.95/x
  3. Step 3: Cross multiply
    709.69x = 1,059.75 × 579.95
  4. Step 4: Simplify right side
    709.69x = 614,600.69
  5. Step 5: Solve for x
    x = 614,600.69/709.69
  6. Step 6: Final answer
    x = 866.01

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.