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Finding the Fourth Proportional to 5,319,064.56, 7,978,098.21 and 1,724,862.65

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Solution

The fourth proportional to 5,319,064.56, 7,978,098.21 and 1,724,862.65 is: 2,587,132.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,319,064.56 : 7,978,098.21 = 1,724,862.65 : x
  2. Step 2: Convert to fraction form
    5,319,064.56/7,978,098.21 = 1,724,862.65/x
  3. Step 3: Cross multiply
    5,319,064.56x = 7,978,098.21 × 1,724,862.65
  4. Step 4: Simplify right side
    5,319,064.56x = 13,761,123,584,882.52
  5. Step 5: Solve for x
    x = 13,761,123,584,882.52/5,319,064.56
  6. Step 6: Final answer
    x = 2,587,132.28

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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.