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Finding the Fourth Proportional to 709.36, 1,064.41 and 384.75

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Solution

The fourth proportional to 709.36, 1,064.41 and 384.75 is: 577.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    709.36 : 1,064.41 = 384.75 : x
  2. Step 2: Convert to fraction form
    709.36/1,064.41 = 384.75/x
  3. Step 3: Cross multiply
    709.36x = 1,064.41 × 384.75
  4. Step 4: Simplify right side
    709.36x = 409,530.79
  5. Step 5: Solve for x
    x = 409,530.79/709.36
  6. Step 6: Final answer
    x = 577.33

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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.