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Finding the Fourth Proportional to 720,239.52, 993,903.84 and 397,942.68

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Solution

The fourth proportional to 720,239.52, 993,903.84 and 397,942.68 is: 549,146.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    720,239.52 : 993,903.84 = 397,942.68 : x
  2. Step 2: Convert to fraction form
    720,239.52/993,903.84 = 397,942.68/x
  3. Step 3: Cross multiply
    720,239.52x = 993,903.84 × 397,942.68
  4. Step 4: Simplify right side
    720,239.52x = 395,516,757,751.89
  5. Step 5: Solve for x
    x = 395,516,757,751.89/720,239.52
  6. Step 6: Final answer
    x = 549,146.15

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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.