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Finding the Fourth Proportional to 906.26, 1,359.56 and 386.25

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Solution

The fourth proportional to 906.26, 1,359.56 and 386.25 is: 579.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    906.26 : 1,359.56 = 386.25 : x
  2. Step 2: Convert to fraction form
    906.26/1,359.56 = 386.25/x
  3. Step 3: Cross multiply
    906.26x = 1,359.56 × 386.25
  4. Step 4: Simplify right side
    906.26x = 525,128.12
  5. Step 5: Solve for x
    x = 525,128.12/906.26
  6. Step 6: Final answer
    x = 579.45

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1.5x scale

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.