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Finding the Fourth Proportional to 506.58, 697.77 and 389.94

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Solution

The fourth proportional to 506.58, 697.77 and 389.94 is: 537.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    506.58 : 697.77 = 389.94 : x
  2. Step 2: Convert to fraction form
    506.58/697.77 = 389.94/x
  3. Step 3: Cross multiply
    506.58x = 697.77 × 389.94
  4. Step 4: Simplify right side
    506.58x = 272,088.43
  5. Step 5: Solve for x
    x = 272,088.43/506.58
  6. Step 6: Final answer
    x = 537.11

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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.