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Finding the Fourth Proportional to 557.99, 836.81 and 521.61

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Solution

The fourth proportional to 557.99, 836.81 and 521.61 is: 782.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    557.99 : 836.81 = 521.61 : x
  2. Step 2: Convert to fraction form
    557.99/836.81 = 521.61/x
  3. Step 3: Cross multiply
    557.99x = 836.81 × 521.61
  4. Step 4: Simplify right side
    557.99x = 436,488.46
  5. Step 5: Solve for x
    x = 436,488.46/557.99
  6. Step 6: Final answer
    x = 782.25

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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.