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Finding the Fourth Proportional to 899, 1,347.94 and 313.86

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Solution

The fourth proportional to 899, 1,347.94 and 313.86 is: 470.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    899 : 1,347.94 = 313.86 : x
  2. Step 2: Convert to fraction form
    899/1,347.94 = 313.86/x
  3. Step 3: Cross multiply
    899x = 1,347.94 × 313.86
  4. Step 4: Simplify right side
    899x = 423,064.45
  5. Step 5: Solve for x
    x = 423,064.45/899
  6. Step 6: Final answer
    x = 470.59

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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.