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Finding the Fourth Proportional to 906.41, 1,359.80 and 313.48

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Solution

The fourth proportional to 906.41, 1,359.80 and 313.48 is: 470.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    906.41 : 1,359.80 = 313.48 : x
  2. Step 2: Convert to fraction form
    906.41/1,359.80 = 313.48/x
  3. Step 3: Cross multiply
    906.41x = 1,359.80 × 313.48
  4. Step 4: Simplify right side
    906.41x = 426,261.74
  5. Step 5: Solve for x
    x = 426,261.74/906.41
  6. Step 6: Final answer
    x = 470.28

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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.