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Finding the Fourth Proportional to 555.33, 766.44 and 380.64

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Solution

The fourth proportional to 555.33, 766.44 and 380.64 is: 525.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    555.33 : 766.44 = 380.64 : x
  2. Step 2: Convert to fraction form
    555.33/766.44 = 380.64/x
  3. Step 3: Cross multiply
    555.33x = 766.44 × 380.64
  4. Step 4: Simplify right side
    555.33x = 291,737.72
  5. Step 5: Solve for x
    x = 291,737.72/555.33
  6. Step 6: Final answer
    x = 525.34

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1.5x scale

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.