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Finding the Fourth Proportional to 386.53, 581.90 and 352.51

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Solution

The fourth proportional to 386.53, 581.90 and 352.51 is: 530.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    386.53 : 581.90 = 352.51 : x
  2. Step 2: Convert to fraction form
    386.53/581.90 = 352.51/x
  3. Step 3: Cross multiply
    386.53x = 581.90 × 352.51
  4. Step 4: Simplify right side
    386.53x = 205,125.57
  5. Step 5: Solve for x
    x = 205,125.57/386.53
  6. Step 6: Final answer
    x = 530.68

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.