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Finding the Fourth Proportional to 316.02, 438.14 and 305.88

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Solution

The fourth proportional to 316.02, 438.14 and 305.88 is: 424.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    316.02 : 438.14 = 305.88 : x
  2. Step 2: Convert to fraction form
    316.02/438.14 = 305.88/x
  3. Step 3: Cross multiply
    316.02x = 438.14 × 305.88
  4. Step 4: Simplify right side
    316.02x = 134,018.26
  5. Step 5: Solve for x
    x = 134,018.26/316.02
  6. Step 6: Final answer
    x = 424.08

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.