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Finding the Fourth Proportional to 5,379.71, 8,071.08 and 1,681.98

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Solution

The fourth proportional to 5,379.71, 8,071.08 and 1,681.98 is: 2,523.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,379.71 : 8,071.08 = 1,681.98 : x
  2. Step 2: Convert to fraction form
    5,379.71/8,071.08 = 1,681.98/x
  3. Step 3: Cross multiply
    5,379.71x = 8,071.08 × 1,681.98
  4. Step 4: Simplify right side
    5,379.71x = 13,575,395.14
  5. Step 5: Solve for x
    x = 13,575,395.14/5,379.71
  6. Step 6: Final answer
    x = 2,523.45

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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.