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Finding the Fourth Proportional to 988.65, 1,481.52 and 501.12

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Solution

The fourth proportional to 988.65, 1,481.52 and 501.12 is: 750.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    988.65 : 1,481.52 = 501.12 : x
  2. Step 2: Convert to fraction form
    988.65/1,481.52 = 501.12/x
  3. Step 3: Cross multiply
    988.65x = 1,481.52 × 501.12
  4. Step 4: Simplify right side
    988.65x = 742,419.30
  5. Step 5: Solve for x
    x = 742,419.30/988.65
  6. Step 6: Final answer
    x = 750.94

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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.