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Finding the Fourth Proportional to 720,173.28, 993,849.57 and 397,890.80

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Solution

The fourth proportional to 720,173.28, 993,849.57 and 397,890.80 is: 549,095.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    720,173.28 : 993,849.57 = 397,890.80 : x
  2. Step 2: Convert to fraction form
    720,173.28/993,849.57 = 397,890.80/x
  3. Step 3: Cross multiply
    720,173.28x = 993,849.57 × 397,890.80
  4. Step 4: Simplify right side
    720,173.28x = 395,443,600,486.96
  5. Step 5: Solve for x
    x = 395,443,600,486.96/720,173.28
  6. Step 6: Final answer
    x = 549,095.07

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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.