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Finding the Fourth Proportional to 720,870.98, 994,715.13 and 398,537.54

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Solution

The fourth proportional to 720,870.98, 994,715.13 and 398,537.54 is: 549,933.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    720,870.98 : 994,715.13 = 398,537.54 : x
  2. Step 2: Convert to fraction form
    720,870.98/994,715.13 = 398,537.54/x
  3. Step 3: Cross multiply
    720,870.98x = 994,715.13 × 398,537.54
  4. Step 4: Simplify right side
    720,870.98x = 396,431,320,910.98
  5. Step 5: Solve for x
    x = 396,431,320,910.98/720,870.98
  6. Step 6: Final answer
    x = 549,933.80

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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.