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Finding the Fourth Proportional to 624.59, 936.80 and 392.77

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Solution

The fourth proportional to 624.59, 936.80 and 392.77 is: 589.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    624.59 : 936.80 = 392.77 : x
  2. Step 2: Convert to fraction form
    624.59/936.80 = 392.77/x
  3. Step 3: Cross multiply
    624.59x = 936.80 × 392.77
  4. Step 4: Simplify right side
    624.59x = 367,944.39
  5. Step 5: Solve for x
    x = 367,944.39/624.59
  6. Step 6: Final answer
    x = 589.10

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.