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Finding the Fourth Proportional to 720,163.42, 993,835.94 and 397,880.95

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Solution

The fourth proportional to 720,163.42, 993,835.94 and 397,880.95 is: 549,081.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    720,163.42 : 993,835.94 = 397,880.95 : x
  2. Step 2: Convert to fraction form
    720,163.42/993,835.94 = 397,880.95/x
  3. Step 3: Cross multiply
    720,163.42x = 993,835.94 × 397,880.95
  4. Step 4: Simplify right side
    720,163.42x = 395,428,387,951.34
  5. Step 5: Solve for x
    x = 395,428,387,951.34/720,163.42
  6. Step 6: Final answer
    x = 549,081.47

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1.5x scale

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.