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Finding the Fourth Proportional to 471.15, 649.80 and 339.93

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Solution

The fourth proportional to 471.15, 649.80 and 339.93 is: 468.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    471.15 : 649.80 = 339.93 : x
  2. Step 2: Convert to fraction form
    471.15/649.80 = 339.93/x
  3. Step 3: Cross multiply
    471.15x = 649.80 × 339.93
  4. Step 4: Simplify right side
    471.15x = 220,886.51
  5. Step 5: Solve for x
    x = 220,886.51/471.15
  6. Step 6: Final answer
    x = 468.82

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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.