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Finding the Fourth Proportional to 720,526.10, 994,377.50 and 398,229.26

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Solution

The fourth proportional to 720,526.10, 994,377.50 and 398,229.26 is: 549,584.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    720,526.10 : 994,377.50 = 398,229.26 : x
  2. Step 2: Convert to fraction form
    720,526.10/994,377.50 = 398,229.26/x
  3. Step 3: Cross multiply
    720,526.10x = 994,377.50 × 398,229.26
  4. Step 4: Simplify right side
    720,526.10x = 395,990,215,985.65
  5. Step 5: Solve for x
    x = 395,990,215,985.65/720,526.10
  6. Step 6: Final answer
    x = 549,584.83

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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.