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Finding the Fourth Proportional to 663.36, 993.72 and 526.64

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Solution

The fourth proportional to 663.36, 993.72 and 526.64 is: 788.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    663.36 : 993.72 = 526.64 : x
  2. Step 2: Convert to fraction form
    663.36/993.72 = 526.64/x
  3. Step 3: Cross multiply
    663.36x = 993.72 × 526.64
  4. Step 4: Simplify right side
    663.36x = 523,332.70
  5. Step 5: Solve for x
    x = 523,332.70/663.36
  6. Step 6: Final answer
    x = 788.91

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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.