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Finding the Fourth Proportional to 557.79, 768.89 and 452.39

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Solution

The fourth proportional to 557.79, 768.89 and 452.39 is: 623.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    557.79 : 768.89 = 452.39 : x
  2. Step 2: Convert to fraction form
    557.79/768.89 = 452.39/x
  3. Step 3: Cross multiply
    557.79x = 768.89 × 452.39
  4. Step 4: Simplify right side
    557.79x = 347,835.43
  5. Step 5: Solve for x
    x = 347,835.43/557.79
  6. Step 6: Final answer
    x = 623.60

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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.