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Finding the Fourth Proportional to 720,792.66, 994,641.48 and 398,506.62

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Solution

The fourth proportional to 720,792.66, 994,641.48 and 398,506.62 is: 549,910.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    720,792.66 : 994,641.48 = 398,506.62 : x
  2. Step 2: Convert to fraction form
    720,792.66/994,641.48 = 398,506.62/x
  3. Step 3: Cross multiply
    720,792.66x = 994,641.48 × 398,506.62
  4. Step 4: Simplify right side
    720,792.66x = 396,371,214,306.60
  5. Step 5: Solve for x
    x = 396,371,214,306.60/720,792.66
  6. Step 6: Final answer
    x = 549,910.17

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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.