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Finding the Fourth Proportional to 316.04, 471.39 and 272.20

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Solution

The fourth proportional to 316.04, 471.39 and 272.20 is: 406.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    316.04 : 471.39 = 272.20 : x
  2. Step 2: Convert to fraction form
    316.04/471.39 = 272.20/x
  3. Step 3: Cross multiply
    316.04x = 471.39 × 272.20
  4. Step 4: Simplify right side
    316.04x = 128,312.36
  5. Step 5: Solve for x
    x = 128,312.36/316.04
  6. Step 6: Final answer
    x = 406.00

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.