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Finding the Fourth Proportional to 709.94, 1,064.01 and 319.52

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Solution

The fourth proportional to 709.94, 1,064.01 and 319.52 is: 478.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    709.94 : 1,064.01 = 319.52 : x
  2. Step 2: Convert to fraction form
    709.94/1,064.01 = 319.52/x
  3. Step 3: Cross multiply
    709.94x = 1,064.01 × 319.52
  4. Step 4: Simplify right side
    709.94x = 339,970.88
  5. Step 5: Solve for x
    x = 339,970.88/709.94
  6. Step 6: Final answer
    x = 478.88

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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.