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Finding the Fourth Proportional to 459.86, 633.99 and 312.24

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Solution

The fourth proportional to 459.86, 633.99 and 312.24 is: 430.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    459.86 : 633.99 = 312.24 : x
  2. Step 2: Convert to fraction form
    459.86/633.99 = 312.24/x
  3. Step 3: Cross multiply
    459.86x = 633.99 × 312.24
  4. Step 4: Simplify right side
    459.86x = 197,953.79
  5. Step 5: Solve for x
    x = 197,953.79/459.86
  6. Step 6: Final answer
    x = 430.47

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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.