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Finding the Fourth Proportional to 626.74, 864.42 and 555.94

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Solution

The fourth proportional to 626.74, 864.42 and 555.94 is: 766.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    626.74 : 864.42 = 555.94 : x
  2. Step 2: Convert to fraction form
    626.74/864.42 = 555.94/x
  3. Step 3: Cross multiply
    626.74x = 864.42 × 555.94
  4. Step 4: Simplify right side
    626.74x = 480,565.35
  5. Step 5: Solve for x
    x = 480,565.35/626.74
  6. Step 6: Final answer
    x = 766.77

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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.