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Finding the Fourth Proportional to 720,630.45, 994,452.53 and 398,332.26

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Solution

The fourth proportional to 720,630.45, 994,452.53 and 398,332.26 is: 549,688.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    720,630.45 : 994,452.53 = 398,332.26 : x
  2. Step 2: Convert to fraction form
    720,630.45/994,452.53 = 398,332.26/x
  3. Step 3: Cross multiply
    720,630.45x = 994,452.53 × 398,332.26
  4. Step 4: Simplify right side
    720,630.45x = 396,122,521,745.96
  5. Step 5: Solve for x
    x = 396,122,521,745.96/720,630.45
  6. Step 6: Final answer
    x = 549,688.85

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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.