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Finding the Fourth Proportional to 720,177.94, 993,855.98 and 397,895.45

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Solution

The fourth proportional to 720,177.94, 993,855.98 and 397,895.45 is: 549,101.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    720,177.94 : 993,855.98 = 397,895.45 : x
  2. Step 2: Convert to fraction form
    720,177.94/993,855.98 = 397,895.45/x
  3. Step 3: Cross multiply
    720,177.94x = 993,855.98 × 397,895.45
  4. Step 4: Simplify right side
    720,177.94x = 395,450,770,407.81
  5. Step 5: Solve for x
    x = 395,450,770,407.81/720,177.94
  6. Step 6: Final answer
    x = 549,101.48

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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.