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Finding the Fourth Proportional to 555.95, 766.82 and 387.62

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Solution

The fourth proportional to 555.95, 766.82 and 387.62 is: 534.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    555.95 : 766.82 = 387.62 : x
  2. Step 2: Convert to fraction form
    555.95/766.82 = 387.62/x
  3. Step 3: Cross multiply
    555.95x = 766.82 × 387.62
  4. Step 4: Simplify right side
    555.95x = 297,234.77
  5. Step 5: Solve for x
    x = 297,234.77/555.95
  6. Step 6: Final answer
    x = 534.64

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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.