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Finding the Fourth Proportional to 455.18, 681.74 and 373.17

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Solution

The fourth proportional to 455.18, 681.74 and 373.17 is: 558.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    455.18 : 681.74 = 373.17 : x
  2. Step 2: Convert to fraction form
    455.18/681.74 = 373.17/x
  3. Step 3: Cross multiply
    455.18x = 681.74 × 373.17
  4. Step 4: Simplify right side
    455.18x = 254,405.85
  5. Step 5: Solve for x
    x = 254,405.85/455.18
  6. Step 6: Final answer
    x = 558.91

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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.