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Finding the Fourth Proportional to 988.31, 1,483.28 and 501.50

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Solution

The fourth proportional to 988.31, 1,483.28 and 501.50 is: 752.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    988.31 : 1,483.28 = 501.50 : x
  2. Step 2: Convert to fraction form
    988.31/1,483.28 = 501.50/x
  3. Step 3: Cross multiply
    988.31x = 1,483.28 × 501.50
  4. Step 4: Simplify right side
    988.31x = 743,866.12
  5. Step 5: Solve for x
    x = 743,866.12/988.31
  6. Step 6: Final answer
    x = 752.66

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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.