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Finding the Fourth Proportional to 987.13, 1,362.18 and 544.93

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Solution

The fourth proportional to 987.13, 1,362.18 and 544.93 is: 751.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    987.13 : 1,362.18 = 544.93 : x
  2. Step 2: Convert to fraction form
    987.13/1,362.18 = 544.93/x
  3. Step 3: Cross multiply
    987.13x = 1,362.18 × 544.93
  4. Step 4: Simplify right side
    987.13x = 742,292.75
  5. Step 5: Solve for x
    x = 742,292.75/987.13
  6. Step 6: Final answer
    x = 751.97

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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.