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Finding the Fourth Proportional to 988.47, 1,483.11 and 372.47

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Solution

The fourth proportional to 988.47, 1,483.11 and 372.47 is: 558.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    988.47 : 1,483.11 = 372.47 : x
  2. Step 2: Convert to fraction form
    988.47/1,483.11 = 372.47/x
  3. Step 3: Cross multiply
    988.47x = 1,483.11 × 372.47
  4. Step 4: Simplify right side
    988.47x = 552,406.57
  5. Step 5: Solve for x
    x = 552,406.57/988.47
  6. Step 6: Final answer
    x = 558.85

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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.