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Finding the Fourth Proportional to 992.03, 1,368.98 and 549.91

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Solution

The fourth proportional to 992.03, 1,368.98 and 549.91 is: 758.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    992.03 : 1,368.98 = 549.91 : x
  2. Step 2: Convert to fraction form
    992.03/1,368.98 = 549.91/x
  3. Step 3: Cross multiply
    992.03x = 1,368.98 × 549.91
  4. Step 4: Simplify right side
    992.03x = 752,809.62
  5. Step 5: Solve for x
    x = 752,809.62/992.03
  6. Step 6: Final answer
    x = 758.86

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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.