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Finding the Fourth Proportional to 720,215.26, 993,917.10 and 397,946.12

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Solution

The fourth proportional to 720,215.26, 993,917.10 and 397,946.12 is: 549,176.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    720,215.26 : 993,917.10 = 397,946.12 : x
  2. Step 2: Convert to fraction form
    720,215.26/993,917.10 = 397,946.12/x
  3. Step 3: Cross multiply
    720,215.26x = 993,917.10 × 397,946.12
  4. Step 4: Simplify right side
    720,215.26x = 395,525,453,546.65
  5. Step 5: Solve for x
    x = 395,525,453,546.65/720,215.26
  6. Step 6: Final answer
    x = 549,176.72

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Double scale
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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.