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Finding the Fourth Proportional to 906.62, 1,359.93 and 393.50

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Solution

The fourth proportional to 906.62, 1,359.93 and 393.50 is: 590.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    906.62 : 1,359.93 = 393.50 : x
  2. Step 2: Convert to fraction form
    906.62/1,359.93 = 393.50/x
  3. Step 3: Cross multiply
    906.62x = 1,359.93 × 393.50
  4. Step 4: Simplify right side
    906.62x = 535,132.46
  5. Step 5: Solve for x
    x = 535,132.46/906.62
  6. Step 6: Final answer
    x = 590.25

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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.