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Finding the Fourth Proportional to 518.13, 713.61 and 430.65

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Solution

The fourth proportional to 518.13, 713.61 and 430.65 is: 593.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    518.13 : 713.61 = 430.65 : x
  2. Step 2: Convert to fraction form
    518.13/713.61 = 430.65/x
  3. Step 3: Cross multiply
    518.13x = 713.61 × 430.65
  4. Step 4: Simplify right side
    518.13x = 307,316.15
  5. Step 5: Solve for x
    x = 307,316.15/518.13
  6. Step 6: Final answer
    x = 593.13

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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.