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Finding the Fourth Proportional to 693.98, 957.32 and 445.02

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Solution

The fourth proportional to 693.98, 957.32 and 445.02 is: 613.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    693.98 : 957.32 = 445.02 : x
  2. Step 2: Convert to fraction form
    693.98/957.32 = 445.02/x
  3. Step 3: Cross multiply
    693.98x = 957.32 × 445.02
  4. Step 4: Simplify right side
    693.98x = 426,026.55
  5. Step 5: Solve for x
    x = 426,026.55/693.98
  6. Step 6: Final answer
    x = 613.89

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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.