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Finding the Fourth Proportional to 679.29, 936.79 and 430.19

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Solution

The fourth proportional to 679.29, 936.79 and 430.19 is: 593.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    679.29 : 936.79 = 430.19 : x
  2. Step 2: Convert to fraction form
    679.29/936.79 = 430.19/x
  3. Step 3: Cross multiply
    679.29x = 936.79 × 430.19
  4. Step 4: Simplify right side
    679.29x = 402,997.69
  5. Step 5: Solve for x
    x = 402,997.69/679.29
  6. Step 6: Final answer
    x = 593.26

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.