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Finding the Fourth Proportional to 554.66, 763.68 and 455.26

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Solution

The fourth proportional to 554.66, 763.68 and 455.26 is: 626.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    554.66 : 763.68 = 455.26 : x
  2. Step 2: Convert to fraction form
    554.66/763.68 = 455.26/x
  3. Step 3: Cross multiply
    554.66x = 763.68 × 455.26
  4. Step 4: Simplify right side
    554.66x = 347,673.77
  5. Step 5: Solve for x
    x = 347,673.77/554.66
  6. Step 6: Final answer
    x = 626.82

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.