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Finding the Fourth Proportional to 720,226.77, 993,886.16 and 397,929.93

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Solution

The fourth proportional to 720,226.77, 993,886.16 and 397,929.93 is: 549,128.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    720,226.77 : 993,886.16 = 397,929.93 : x
  2. Step 2: Convert to fraction form
    720,226.77/993,886.16 = 397,929.93/x
  3. Step 3: Cross multiply
    720,226.77x = 993,886.16 × 397,929.93
  4. Step 4: Simplify right side
    720,226.77x = 395,497,048,087.12
  5. Step 5: Solve for x
    x = 395,497,048,087.12/720,226.77
  6. Step 6: Final answer
    x = 549,128.50

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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.