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Finding the Fourth Proportional to 906.59, 1,359.69 and 386.57

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Solution

The fourth proportional to 906.59, 1,359.69 and 386.57 is: 579.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    906.59 : 1,359.69 = 386.57 : x
  2. Step 2: Convert to fraction form
    906.59/1,359.69 = 386.57/x
  3. Step 3: Cross multiply
    906.59x = 1,359.69 × 386.57
  4. Step 4: Simplify right side
    906.59x = 525,617.31
  5. Step 5: Solve for x
    x = 525,617.31/906.59
  6. Step 6: Final answer
    x = 579.77

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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.