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Finding the Fourth Proportional to 720,227.15, 993,886.67 and 397,930.31

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Solution

The fourth proportional to 720,227.15, 993,886.67 and 397,930.31 is: 549,129.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    720,227.15 : 993,886.67 = 397,930.31 : x
  2. Step 2: Convert to fraction form
    720,227.15/993,886.67 = 397,930.31/x
  3. Step 3: Cross multiply
    720,227.15x = 993,886.67 × 397,930.31
  4. Step 4: Simplify right side
    720,227.15x = 395,497,626,723.36
  5. Step 5: Solve for x
    x = 395,497,626,723.36/720,227.15
  6. Step 6: Final answer
    x = 549,129.02

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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.