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Finding the Fourth Proportional to 781,647.19, 1,171,870 and 397,079.87

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Solution

The fourth proportional to 781,647.19, 1,171,870 and 397,079.87 is: 595,314.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    781,647.19 : 1,171,870 = 397,079.87 : x
  2. Step 2: Convert to fraction form
    781,647.19/1,171,870 = 397,079.87/x
  3. Step 3: Cross multiply
    781,647.19x = 1,171,870 × 397,079.87
  4. Step 4: Simplify right side
    781,647.19x = 465,325,987,256.90
  5. Step 5: Solve for x
    x = 465,325,987,256.90/781,647.19
  6. Step 6: Final answer
    x = 595,314.61

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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.