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Finding the Fourth Proportional to 720,967.67, 994,941.88 and 398,699.63

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Solution

The fourth proportional to 720,967.67, 994,941.88 and 398,699.63 is: 550,209.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    720,967.67 : 994,941.88 = 398,699.63 : x
  2. Step 2: Convert to fraction form
    720,967.67/994,941.88 = 398,699.63/x
  3. Step 3: Cross multiply
    720,967.67x = 994,941.88 × 398,699.63
  4. Step 4: Simplify right side
    720,967.67x = 396,682,957,434.01
  5. Step 5: Solve for x
    x = 396,682,957,434.01/720,967.67
  6. Step 6: Final answer
    x = 550,209.08

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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.