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Finding the Fourth Proportional to 1,326, 1,988.32 and 503.64

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Solution

The fourth proportional to 1,326, 1,988.32 and 503.64 is: 755.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,326 : 1,988.32 = 503.64 : x
  2. Step 2: Convert to fraction form
    1,326/1,988.32 = 503.64/x
  3. Step 3: Cross multiply
    1,326x = 1,988.32 × 503.64
  4. Step 4: Simplify right side
    1,326x = 1,001,397.48
  5. Step 5: Solve for x
    x = 1,001,397.48/1,326
  6. Step 6: Final answer
    x = 755.20

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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.