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Finding the Fourth Proportional to 720,170.95, 993,846.36 and 397,888.47

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Solution

The fourth proportional to 720,170.95, 993,846.36 and 397,888.47 is: 549,091.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    720,170.95 : 993,846.36 = 397,888.47 : x
  2. Step 2: Convert to fraction form
    720,170.95/993,846.36 = 397,888.47/x
  3. Step 3: Cross multiply
    720,170.95x = 993,846.36 × 397,888.47
  4. Step 4: Simplify right side
    720,170.95x = 395,440,006,849.43
  5. Step 5: Solve for x
    x = 395,440,006,849.43/720,170.95
  6. Step 6: Final answer
    x = 549,091.86

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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.