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Finding the Fourth Proportional to 591, 815.59 and 384.36

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Solution

The fourth proportional to 591, 815.59 and 384.36 is: 530.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    591 : 815.59 = 384.36 : x
  2. Step 2: Convert to fraction form
    591/815.59 = 384.36/x
  3. Step 3: Cross multiply
    591x = 815.59 × 384.36
  4. Step 4: Simplify right side
    591x = 313,480.17
  5. Step 5: Solve for x
    x = 313,480.17/591
  6. Step 6: Final answer
    x = 530.42

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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.