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Finding the Fourth Proportional to 478.15, 716.14 and 397.15

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Solution

The fourth proportional to 478.15, 716.14 and 397.15 is: 594.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    478.15 : 716.14 = 397.15 : x
  2. Step 2: Convert to fraction form
    478.15/716.14 = 397.15/x
  3. Step 3: Cross multiply
    478.15x = 716.14 × 397.15
  4. Step 4: Simplify right side
    478.15x = 284,415.00
  5. Step 5: Solve for x
    x = 284,415.00/478.15
  6. Step 6: Final answer
    x = 594.82

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.