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Finding the Fourth Proportional to 710.39, 1,065.99 and 299.49

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Solution

The fourth proportional to 710.39, 1,065.99 and 299.49 is: 449.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    710.39 : 1,065.99 = 299.49 : x
  2. Step 2: Convert to fraction form
    710.39/1,065.99 = 299.49/x
  3. Step 3: Cross multiply
    710.39x = 1,065.99 × 299.49
  4. Step 4: Simplify right side
    710.39x = 319,252.60
  5. Step 5: Solve for x
    x = 319,252.60/710.39
  6. Step 6: Final answer
    x = 449.41

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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.