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Finding the Fourth Proportional to 987.01, 1,362.06 and 544.90

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Solution

The fourth proportional to 987.01, 1,362.06 and 544.90 is: 751.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    987.01 : 1,362.06 = 544.90 : x
  2. Step 2: Convert to fraction form
    987.01/1,362.06 = 544.90/x
  3. Step 3: Cross multiply
    987.01x = 1,362.06 × 544.90
  4. Step 4: Simplify right side
    987.01x = 742,186.49
  5. Step 5: Solve for x
    x = 742,186.49/987.01
  6. Step 6: Final answer
    x = 751.95

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.