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Finding the Fourth Proportional to 987.47, 1,483.32 and 622.52

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Solution

The fourth proportional to 987.47, 1,483.32 and 622.52 is: 935.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    987.47 : 1,483.32 = 622.52 : x
  2. Step 2: Convert to fraction form
    987.47/1,483.32 = 622.52/x
  3. Step 3: Cross multiply
    987.47x = 1,483.32 × 622.52
  4. Step 4: Simplify right side
    987.47x = 923,396.37
  5. Step 5: Solve for x
    x = 923,396.37/987.47
  6. Step 6: Final answer
    x = 935.11

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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.