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Finding the Fourth Proportional to 555.12, 766.08 and 415.26

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Solution

The fourth proportional to 555.12, 766.08 and 415.26 is: 573.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    555.12 : 766.08 = 415.26 : x
  2. Step 2: Convert to fraction form
    555.12/766.08 = 415.26/x
  3. Step 3: Cross multiply
    555.12x = 766.08 × 415.26
  4. Step 4: Simplify right side
    555.12x = 318,122.38
  5. Step 5: Solve for x
    x = 318,122.38/555.12
  6. Step 6: Final answer
    x = 573.07

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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.