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Finding the Fourth Proportional to 816.98, 1,127.01 and 505.94

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Solution

The fourth proportional to 816.98, 1,127.01 and 505.94 is: 697.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    816.98 : 1,127.01 = 505.94 : x
  2. Step 2: Convert to fraction form
    816.98/1,127.01 = 505.94/x
  3. Step 3: Cross multiply
    816.98x = 1,127.01 × 505.94
  4. Step 4: Simplify right side
    816.98x = 570,199.44
  5. Step 5: Solve for x
    x = 570,199.44/816.98
  6. Step 6: Final answer
    x = 697.94

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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.