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Finding the Fourth Proportional to 720,625.32, 994,462.62 and 398,335.56

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Solution

The fourth proportional to 720,625.32, 994,462.62 and 398,335.56 is: 549,702.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    720,625.32 : 994,462.62 = 398,335.56 : x
  2. Step 2: Convert to fraction form
    720,625.32/994,462.62 = 398,335.56/x
  3. Step 3: Cross multiply
    720,625.32x = 994,462.62 × 398,335.56
  4. Step 4: Simplify right side
    720,625.32x = 396,129,824,636.77
  5. Step 5: Solve for x
    x = 396,129,824,636.77/720,625.32
  6. Step 6: Final answer
    x = 549,702.90

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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.