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Finding the Fourth Proportional to 723.99, 1,086.06 and 313.01

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Solution

The fourth proportional to 723.99, 1,086.06 and 313.01 is: 469.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    723.99 : 1,086.06 = 313.01 : x
  2. Step 2: Convert to fraction form
    723.99/1,086.06 = 313.01/x
  3. Step 3: Cross multiply
    723.99x = 1,086.06 × 313.01
  4. Step 4: Simplify right side
    723.99x = 339,951.81
  5. Step 5: Solve for x
    x = 339,951.81/723.99
  6. Step 6: Final answer
    x = 469.55

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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.