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Finding the Fourth Proportional to 720,735.30, 994,635.45 and 398,466.14

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Solution

The fourth proportional to 720,735.30, 994,635.45 and 398,466.14 is: 549,894.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    720,735.30 : 994,635.45 = 398,466.14 : x
  2. Step 2: Convert to fraction form
    720,735.30/994,635.45 = 398,466.14/x
  3. Step 3: Cross multiply
    720,735.30x = 994,635.45 × 398,466.14
  4. Step 4: Simplify right side
    720,735.30x = 396,328,543,495.49
  5. Step 5: Solve for x
    x = 396,328,543,495.49/720,735.30
  6. Step 6: Final answer
    x = 549,894.73

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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.