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Finding the Fourth Proportional to 555.86, 768.12 and 425.78

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Solution

The fourth proportional to 555.86, 768.12 and 425.78 is: 588.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    555.86 : 768.12 = 425.78 : x
  2. Step 2: Convert to fraction form
    555.86/768.12 = 425.78/x
  3. Step 3: Cross multiply
    555.86x = 768.12 × 425.78
  4. Step 4: Simplify right side
    555.86x = 327,050.13
  5. Step 5: Solve for x
    x = 327,050.13/555.86
  6. Step 6: Final answer
    x = 588.37

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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.