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Finding the Fourth Proportional to 454.86, 681.55 and 318.06

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Solution

The fourth proportional to 454.86, 681.55 and 318.06 is: 476.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    454.86 : 681.55 = 318.06 : x
  2. Step 2: Convert to fraction form
    454.86/681.55 = 318.06/x
  3. Step 3: Cross multiply
    454.86x = 681.55 × 318.06
  4. Step 4: Simplify right side
    454.86x = 216,773.00
  5. Step 5: Solve for x
    x = 216,773.00/454.86
  6. Step 6: Final answer
    x = 476.57

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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.