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Finding the Fourth Proportional to 555.32, 766.46 and 380.88

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Solution

The fourth proportional to 555.32, 766.46 and 380.88 is: 525.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    555.32 : 766.46 = 380.88 : x
  2. Step 2: Convert to fraction form
    555.32/766.46 = 380.88/x
  3. Step 3: Cross multiply
    555.32x = 766.46 × 380.88
  4. Step 4: Simplify right side
    555.32x = 291,929.28
  5. Step 5: Solve for x
    x = 291,929.28/555.32
  6. Step 6: Final answer
    x = 525.70

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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.