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Finding the Fourth Proportional to 720,745.30, 994,542.06 and 398,411.62

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Solution

The fourth proportional to 720,745.30, 994,542.06 and 398,411.62 is: 549,760.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    720,745.30 : 994,542.06 = 398,411.62 : x
  2. Step 2: Convert to fraction form
    720,745.30/994,542.06 = 398,411.62/x
  3. Step 3: Cross multiply
    720,745.30x = 994,542.06 × 398,411.62
  4. Step 4: Simplify right side
    720,745.30x = 396,237,113,282.74
  5. Step 5: Solve for x
    x = 396,237,113,282.74/720,745.30
  6. Step 6: Final answer
    x = 549,760.25

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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.